| 单词 | center of mass |
| 例句 | "But the accelerometers caught it and calculated the new center of mass. The guidance computer is adjusting the engines' thrusts to counteract. We're still good." The Martian 2011-01-01T00:00:00Z "The VAL is in the nose. Escaping air would make a thrust vector through our center of mass. We just need to point the ship directly away from where we want to go." The Martian 2011-01-01T00:00:00Z Acrobats practising tightrope walking, also called funambulism, maintain their balance by positioning their center of mass directly over their base of support, a rope or a wire. Tightrope walker stuns Parisians with Montmartre performance 2018-07-21T04:00:00Z She accomplishes this trick by lifting her arms and legs relative to her center of mass on the way up and then lowering them on the way down, displacing her head in the opposite direction. ‘100 Essential Things You Didn’t Know About Math and the Arts’ 2015-02-12T05:00:00Z The gaze of the Western reader, who lives at the bright center of mass culture, is supposed to shine into every darkness on every continent. Letters to the Editor 2018-10-12T04:00:00Z Only now, the writers' primary struggle is to settle upon a new center of mass. Without Roseanne, who are “The Conners” now? 2018-11-28T05:00:00Z Eventually, when its nuclear batteries run out of juice for good, it will continue to quietly orbit the center of mass of the Milky Way for eternity. These are the oldest space probes that are still operational 2023-05-07T04:00:00Z When the force acting on an object is parallel to the direction of the motion of the center of mass, the mechanical energy . College Physics for AP Courses 2015-08-12T00:00:00Z In a binary star system, both stars orbit their center of mass. Astronomy 2016-10-13T00:00:00Z The lamina is perfectly balanced about its center of mass. Calculus, Volume 3 2016-03-30T00:00:00Z The basic idea of the center of mass is the notion of a balancing point. Calculus, Volume 1 2016-03-30T00:00:00Z ALMATY, Kazakhstan — One evening in early January, Yerlan Zhagiparov left his home to see what was happening nearby at the city’s Republic Square, a center of mass political protests. In Kazakh Uprising, Reports of Widespread Abuses by Security Forces 2022-01-31T05:00:00Z Consider the center of mass of this system as the frame of reference. College Physics for AP Courses 2015-08-12T00:00:00Z The image shows the relative positions of two, different-mass stars from their center of mass, similar to how two masses would have to be located on a seesaw in order to keep it level. Astronomy 2016-10-13T00:00:00Z Figure 5.64 A lamina is perfectly balanced on a spindle if the lamina’s center of mass sits on the spindle. Calculus, Volume 3 2016-03-30T00:00:00Z Mathematically, that sweet spot is called the center of mass of the plate. Calculus, Volume 1 2016-03-30T00:00:00Z The objects might zoom by each other, or they might enter into an elliptical orbit around a shared center of mass. Physicists Edge Closer to Taming the Three-Body Problem 2021-05-07T04:00:00Z The center of mass moves toward the stationary cart 2 at a speed v . College Physics for AP Courses 2015-08-12T00:00:00Z Negative velocity means the star is moving toward us relative to the center of mass. Astronomy 2016-10-13T00:00:00Z If the object has uniform density, the center of mass is the geometric center of the object, which is called the centroid. Calculus, Volume 3 2016-03-30T00:00:00Z Find the moment of the system with respect to the origin and find the center of mass of the system. Calculus, Volume 1 2016-03-30T00:00:00Z An expanded chest accommodates large flight muscles, and a corresponding forward sweep of the wings aligns the center of lift with the center of mass. How to Make a Hippogriff Fly and Other Flights of Fancy 2021-04-09T04:00:00Z As the two carts approach, the center of mass is exactly between the two carts, at the point where they will collide. College Physics for AP Courses 2015-08-12T00:00:00Z The masses of stars can be determined by analysis of the orbit of binary stars—two stars that orbit a common center of mass. Astronomy 2016-10-13T00:00:00Z Figure 5.64 shows a point P as the center of mass of a lamina. Calculus, Volume 3 2016-03-30T00:00:00Z Now, to find the center of mass, we need the total mass of the system: Calculus, Volume 1 2016-03-30T00:00:00Z The distance from a black hole's center of mass to where gravity's pull is too strong to overcome is called the event horizon. Could a human enter a black hole to study it? 2021-02-07T05:00:00Z As cart 1 approaches cart 2, the center of mass remains exactly halfway between the two carts. College Physics for AP Courses 2015-08-12T00:00:00Z Both the planet and the star actually revolve about their common center of mass. Astronomy 2016-10-13T00:00:00Z Calculate and plot the center of mass of the lamina. Calculus, Volume 3 2016-03-30T00:00:00Z Find the moment of the system with respect to the origin and find the center of mass of the system. Calculus, Volume 1 2016-03-30T00:00:00Z Astronomers estimate there are nearly 100 billion stars in the Milky Way galaxy, orbiting around our galaxy's common center of mass that consists of a supermassive central black hole. Astronomers discover a peculiar batch of stars moving fast enough to leave the galaxy 2021-01-05T05:00:00Z The center of mass moves toward the stationary cart 2 at a speed v . College Physics for AP Courses 2015-08-12T00:00:00Z The star and the planet each exert a force on the other, and we can find a stable point, the center of mass, between them about which both objects move. Astronomy 2016-10-13T00:00:00Z Show that the center of mass of the solid is not located within the solid. Calculus, Volume 3 2016-03-30T00:00:00Z We can generalize this concept to find the center of mass of a system of point masses in a plane. Calculus, Volume 1 2016-03-30T00:00:00Z The solution here was to place the arm next to the wearer’s center of mass and secure the setup with a rigid harness, though the experience still looks a little wobbly to us. This wearable robotic arm can hold tools, pick fruit, and punch through walls 2020-06-08T04:00:00Z As the two carts approach, the center of mass is exactly between the two carts, at the point where they will collide. College Physics for AP Courses 2015-08-12T00:00:00Z A massive star barely swings around the center of mass, while a low-mass planet makes a much larger “tour.” Astronomy 2016-10-13T00:00:00Z Graph Q and locate its center of mass. Calculus, Volume 3 2016-03-30T00:00:00Z Find the center of mass of the system. Calculus, Volume 1 2016-03-30T00:00:00Z Police are generally trained to aim for center of mass, and it’s uncommon for an officer to shoot someone in the head on purpose, said Tom Manger, a retired police chief in Virginia and Maryland. Experts: Silence after Texas police shooting risks mistrust 2019-12-19T05:00:00Z Similarly, for a rod made of homogenous material, the center of mass will be at the midpoint. College Physics for AP Courses 2015-08-12T00:00:00Z As the star moves back and forth in orbit around the system’s center of mass in response to the gravitational tug of an orbiting planet, the lines in its spectrum will shift back and forth. Astronomy 2016-10-13T00:00:00Z Finally we are ready to restate the expressions for the center of mass in terms of integrals. Calculus, Volume 3 2016-03-30T00:00:00Z Find the center of mass of the system. Calculus, Volume 1 2016-03-30T00:00:00Z In reality, the sun and planets revolve around the center of mass of the entire solar system. Who Really Discovered the First Exoplanet? 2019-11-12T05:00:00Z For the rider in the wagon in Figure 4.5, the center of mass is probably between the rider’s hips. College Physics for AP Courses 2015-08-12T00:00:00Z The motion of a star around a common center of mass with an orbiting planet can be detected by measuring the changing speed of the star. Astronomy 2016-10-13T00:00:00Z Find the center of mass using decimal approximation. Calculus, Volume 3 2016-03-30T00:00:00Z Next we develop techniques to find the center of mass of a lamina. Calculus, Volume 1 2016-03-30T00:00:00Z The sun is the most massive component of the solar system, so it is always close to the center of mass, but it does shuffle around a little. Who Really Discovered the First Exoplanet? 2019-11-12T05:00:00Z Due to internal forces, the rider’s hand or hair may accelerate slightly differently, but it is the acceleration of the system’s center of mass that interests us. College Physics for AP Courses 2015-08-12T00:00:00Z Each star exerts a gravitational force on the other, with the result that both stars orbit a point between them called the center of mass. Astronomy 2016-10-13T00:00:00Z Show that its center of mass lies in the plane z = a + b. Calculus, Volume 3 2016-03-30T00:00:00Z In this case, the center of mass of the lamina corresponds to the centroid of the delineated region in the plane. Calculus, Volume 1 2016-03-30T00:00:00Z If you built a scale model of the solar system laying on a flat disk, the center of mass is where you could balance the disk on your fingertip. Who Really Discovered the First Exoplanet? 2019-11-12T05:00:00Z The change in linear momentum for a constant-mass system is the product of the mass of the system and the change in velocity of the center of mass. College Physics for AP Courses 2015-08-12T00:00:00Z The star with the higher mass will be found closer to the center of mass, while the star with the lower mass will be farther from it. Astronomy 2016-10-13T00:00:00Z Finding the mass, center of mass, moments, and moments of inertia in double integrals: Calculus, Volume 3 2016-03-30T00:00:00Z Recall that the center of mass of a lamina is the point where the lamina balances. Calculus, Volume 1 2016-03-30T00:00:00Z Their research relied on the fact that planets don’t orbit stars; instead, both planets and stars orbit their common center of mass. Nobel Prize in physics awarded for research on exoplanets and the structure of the universe 2019-10-08T04:00:00Z So, the center of mass of the system is in free fall but, by rapidly expelling mass, part of the system can accelerate upward. College Physics for AP Courses 2015-08-12T00:00:00Z When one star is approaching us relative to the center of mass, the other star is receding from us. Astronomy 2016-10-13T00:00:00Z Adjusting the weights allowed the students to control both the wheel’s inertia and center of mass. Humans Can Improve Technology without Really Understanding It 2019-09-26T04:00:00Z In the next example, we use this theorem to find the center of mass of a lamina. Calculus, Volume 1 2016-03-30T00:00:00Z "Doing even a slightly better job managing the center of mass on the backswing will get you hitting your driver with more authority when it counts." Odds are you didn’t win your club championship. We asked three top teachers to explain why - Golf Digest 2019-09-12T04:00:00Z What is the change in momentum of the center of mass of the system as a result of the collision? College Physics for AP Courses 2015-08-12T00:00:00Z Note that positive velocity means the star is moving away from us relative to the center of mass of the system, which in this case is 40 kilometers per second. Astronomy 2016-10-13T00:00:00Z When walking, the team says your center of mass moves like an “inverted pendulum,” while running causes it to move like a “spring-mass system.” Scientists develop robotic shorts that make it easier to walk and run 2019-08-19T04:00:00Z To calculate the center of mass of the structure, we treat it as a lamina and use a two-dimensional region in the xy-plane to represent the platform. Calculus, Volume 1 2016-03-30T00:00:00Z “He has the ability to drop his center of mass and change direction or drop the center of mass and hit the brakes on you in two or three steps,” Callaway said. Antoine Wesley, one of college football’s most productive receivers, aims to catch on with Ravens 2019-08-07T04:00:00Z After the collision, it is the sum of the disk's momentum and that of the center of mass of the stick. College Physics for AP Courses 2015-08-12T00:00:00Z As we saw in our seesaw analogy, the more massive star is closer to the center of mass and therefore has a smaller orbit. Astronomy 2016-10-13T00:00:00Z The detection works like this: When two stars form a binary system, they do not technically orbit each other; instead they orbit a common center of mass. Future Gravitational Wave Detectors Could Find Exoplanets, Too 2019-07-08T04:00:00Z Calculate the center of mass of each of the three sub-regions. Calculus, Volume 1 2016-03-30T00:00:00Z Felids and ungulates are quadrupeds with a different center of mass than theropods who walked on two legs. Run Like a Dinosaur 2019-06-02T04:00:00Z Two parakeets sit on a swing with their combined center of mass 10.0 cm below the pivot. College Physics for AP Courses 2015-08-12T00:00:00Z To summarize, a good measurement of the motion of two stars around a common center of mass, combined with the laws of gravity, allows us to determine the masses of stars in such systems. Astronomy 2016-10-13T00:00:00Z If a planetary body resides in such a system, the planet’s gravitational influence will perturb this center of mass, causing it to cyclically wobble back and forth in sync with the planet’s to-and-fro tugging. Future Gravitational Wave Detectors Could Find Exoplanets, Too 2019-07-08T04:00:00Z Now, treat each of the three sub-regions as a point mass located at the center of mass of the corresponding sub-region. Calculus, Volume 1 2016-03-30T00:00:00Z They also all shared a center of mass oriented in front of the hips, indicating that Spinosaurus - like Tyrannosaurus, Allosaurus, and the rest - was perfectly capable of walking around on land. Spinosaurus Was a Terrible Swimmer 2018-08-27T04:00:00Z The acceleration of the center of mass of a system is related to the net force exerted on the system, where a = ∑ F / m . College Physics for AP Courses 2015-08-12T00:00:00Z What would you observe as you watched these stars as they orbited the center of mass, assuming very circular orbits, and assuming the orbit was face on to your view? Astronomy 2016-10-13T00:00:00Z Those provide a lower center of gravity and forgiveness on off-center hits while keeping the center of mass in line with the center of the face. Cobra King Forged Tec Black irons offer multiple ways to push new frontiers in improvement - Golf Digest 2018-02-20T05:00:00Z Using this representation, calculate the center of mass of the entire platform. Calculus, Volume 1 2016-03-30T00:00:00Z Rather, MU69's shifted location suggests that it is offset from its center of mass, hinting at the possibility of at least one natural satellite. Beyond Pluto, New Horizons' Next Target May Have a Moon 2017-12-28T05:00:00Z Although Eros is not spherical, calculate the acceleration due to gravity on its surface at a point an average distance from its center of mass. College Physics for AP Courses 2015-08-12T00:00:00Z Most researchers initially assumed this stance was a response to a suddenly shifted center of mass. Lizards Learn a Silly Walk after Losing Their Tail 2017-12-18T05:00:00Z These two behemoths orbit their common center of mass about once every 100,000 years, the researchers said. Binary Giant Black Holes Spotted at Galaxy's Core 2017-09-21T04:00:00Z Treating the visitor center as a point mass, recalculate the center of mass of the system. Calculus, Volume 1 2016-03-30T00:00:00Z Any two objects in orbit around each other are actually in orbit around an invisible point called the center of mass, or barycenter. A Matter of Considerable Gravity 2017-06-26T04:00:00Z As cart 1 approaches cart 2, the center of mass remains exactly halfway between the two carts. College Physics for AP Courses 2015-08-12T00:00:00Z The geographic center is also a balance point — it’s analogous to a center of mass or a center of gravity. Where’s your county seat? A modern mathematical method for calculating centers of geography 2017-04-17T04:00:00Z Engineers must locate the center of mass for each steel piece to determine where fastening loops should be welded, for a balanced lift. The end is near for Bertha: After nearly 2 miles in 4 years, tunnel machine about to break through 2017-03-31T04:00:00Z For the following exercises, use a calculator to draw the region, then compute the center of mass ⎛ –x , –y ⎞. Calculus, Volume 1 2016-03-30T00:00:00Z Even in their first trimester of pregnancy, women's center of mass is farther forward, the researchers said. How Pregnancy Can Trip You Up 2016-07-01T04:00:00Z Suppose instead that the two carts move with equal speeds v in opposite directions towards the center of mass. College Physics for AP Courses 2015-08-12T00:00:00Z Coordination may decline; flexibility certainly becomes more limited; and balance, due to a changing center of mass, may result in poor play. Kids and Sports: Can We Keep Our Eye on the Ball? 2015-09-21T04:00:00Z Pollen is always carried on the bees’ hairy legs, where it dangles further from the insects’ center of mass. Bumblebees prefer pollen on windy days 2015-08-03T04:00:00Z Mathematically, the center of mass of a system is the point at which the total mass of the system could be concentrated without changing the moment. Calculus, Volume 1 2016-03-30T00:00:00Z By contrast, Earth is 81 times the mass of the Moon, and the center of mass is within Earth. Astronomers Describe Chaotic Dance of Pluto’s Moons 2015-06-03T04:00:00Z Consider the center of mass of this system. College Physics for AP Courses 2015-08-12T00:00:00Z There are also several physical factors that remain unaccounted for like friction, torque and the center of mass in the passenger cars. The Amtrak Derailment And Newton's First Law 2015-05-16T04:00:00Z But when she’s outside those walls, she unloads half a mag at the center of mass of a zombie as it continues to lerch forward. Walking Dead Episode 513: Hide The Women And Children 2015-03-08T05:00:00Z Loosely speaking, the center of mass can be thought of as the balancing point of the system. Calculus, Volume 1 2016-03-30T00:00:00Z The largest, Charon, was discovered in 1978, and it is so large, about one-ninth the mass of Pluto, that the center of mass of the two lies outside Pluto. Astronomers Describe Chaotic Dance of Pluto’s Moons 2015-06-03T04:00:00Z Suppose instead that the two carts move with equal speeds v in opposite directions towards the center of mass. College Physics for AP Courses 2015-08-12T00:00:00Z The two objects also complete one orbit around their common center of mass, or barycenter, in the same amount of time. NASA Probe Captures Images of Pluto and Its Moon Charon [Video] 2015-02-13T05:00:00Z The future device would quickly rearrange or even eject internal components to change its center of mass. Future Smartphone Could Fall Smartly Too 2014-12-19T05:00:00Z Find the mass and the center of mass of ρ = 1 on the region bounded by y = x5 and y = x. Calculus, Volume 1 2016-03-30T00:00:00Z Police are trained to shoot at the center of mass and stop the threat. Darren Wilson’s first job was on a troubled police force disbanded by authorities The center of mass of the space probe takes the same path it would if the separation did not occur. College Physics for AP Courses 2015-08-12T00:00:00Z The Milky Way is full of so-called binary star systems—two stars orbiting their common center of mass. A Star Wars-Like Tatooine Ignores One of its Suns 2014-07-03T04:00:00Z Turkish police on Saturday shut Gezi Park, the Istanbul square at the center of mass demonstrations in 2013, to prevent any efforts to mark the anniversary of the biggest anti-government protests in decades. Police shut Istanbul park to pre-empt protests one year after unrest 2014-05-31T04:00:00Z The robot's center of mass is lower than the axis of rotation, stabilizing it and eliminating the need for sensors and control algorithms to keep it upright. This is the world's fastest robot on legs 2014-05-22T04:00:00Z For instance, maybe we base our guesses as to whether a block tower will fall based on the tower’s height or center of mass. The Video Game Engine in Your Head 2014-04-01T16:00:00Z Calculate the velocity of the center of mass of the system before and after the collision. College Physics for AP Courses 2015-08-12T00:00:00Z So, for a pyramid, the center of mass will be much lower than it's physical center because so much more of the mass is located in the lower half. Sporty Science: The Mechanics of a Carnival Game 2014-03-06T18:00:00Z Because the center of mass extends beyond the hand, the kettlebell allows for ballistic, or fast, swinging motions that combine cardio-respiratory, strength, and flexibility training. Kettlebells swing to a full body workout 2013-11-25T09:03:11Z If the two children weigh the same, the system's center of mass is located in center of the seesaw's plank and directly above the fulcrum. Seesaw Science: The Hammer-Ruler Trick 2013-06-27T17:15:10.683Z In physics the center of mass of an object is a point where the entire mass of the object may be represented as being concentrated. Circus Science: How to Balance Anything 2013-04-11T14:45:00.390Z Suppose a 900-kg car is on the bridge in Figure 9.35 with its center of mass halfway between the hinges and the cable attachments. College Physics for AP Courses 2015-08-12T00:00:00Z On the other hand, the second pyramid, with its lower center of mass, was likely the hardest to knock over completely. Sporty Science: The Mechanics of a Carnival Game 2014-03-06T18:00:00Z That’s the movement of the star as it spins around it’s center of mass, which is caused by the gravitational attraction of the planet. Astronomers Find Planets Within A Cluster Of Stars 2012-09-16T04:52:55Z Put a heavier child on one end of the seesaw, and you've shifted the system's center of mass away from the fulcrum. Seesaw Science: The Hammer-Ruler Trick 2013-06-27T17:15:10.683Z In some cases the center of mass is a point in space outside the actual object. Circus Science: How to Balance Anything 2013-04-11T14:45:00.390Z Construct a problem in which you calculate the mass of the arm and find its center of mass based on the scale readings and the distances of the scales from the shoulder joint. College Physics for AP Courses 2015-08-12T00:00:00Z In the third pyramid arrangement the center of mass became much higher—somewhere within the top bottle. Sporty Science: The Mechanics of a Carnival Game 2014-03-06T18:00:00Z The solution to this 2-body problem is for each star to be in an elliptical orbit around the two bodies' center of mass. Body Double: Understanding the Astrophysics of a Newly-Discovered Multi-Planet Binary Star System 2012-09-11T12:45:00.180Z Try using the six-inch mark on your ruler as your balancing point—this is roughly the location of the ruler's center of mass, and you'll notice it's at the middle of the ruler. Seesaw Science: The Hammer-Ruler Trick 2013-06-27T17:15:10.683Z For example, the center of mass for a hula hoop is in its empty middle. Circus Science: How to Balance Anything 2013-04-11T14:45:00.390Z Explain why the center of mass of the load needs to be directly above the person's neck vertebrae. College Physics for AP Courses 2015-08-12T00:00:00Z But steps too far out in front of the center of mass throw off balance and slow a runner. Bodies Built for Gold 2012-07-27T01:18:28Z The distance jumped depends on the height, angle and velocity of projection of the center of mass. Long jumping for gold means aiming high 2012-07-19T14:14:51Z Background An object's center of mass is a unique point where that object's mass is centered. Seesaw Science: The Hammer-Ruler Trick 2013-06-27T17:15:10.683Z Based on your new drawing, where is the center of mass of your new structure? Circus Science: How to Balance Anything 2013-04-11T14:45:00.390Z The center of mass of the ladder is 2 m from the bottom. College Physics for AP Courses 2015-08-12T00:00:00Z Torques increased as the center of mass of the unsupported region of the snake was farther away from the support. Why Brown Snakes Don't Mind the Gaps 2012-07-12T05:15:00Z "Raising the arms increases the height and velocity of the center of mass," said Lees. Long jumping for gold means aiming high 2012-07-19T14:14:51Z Nix, Hydra, and the new moon don't actually orbit Pluto; they circle the center of mass of Pluto and Charon, because Charon is 12% as massive as Pluto. Pluto's Moons Offer Hints of Alien Worlds 2012-06-06T20:57:17Z When you added two more marshmallows to the middle one, did you find that the center of mass shifted up? Circus Science: How to Balance Anything 2013-04-11T14:45:00.390Z Figure 9.42 The center of mass of the head lies in front of its major point of support, requiring muscle action to hold the head erect. College Physics for AP Courses 2015-08-12T00:00:00Z The tai chi exercises were designed to improve balance with a controlled displacement of the center of mass. Tai chi may help balance in people with Parkinson's 2012-02-08T23:16:12Z According to their calculations, its center of mass will reach Sagittarius A* in the summer of 2013. Cosmic Black Hole Collision is Coming 2011-12-15T17:37:58Z The novelty is that the caterpillar's center of mass moves forward while the middle 'legs' are anchored to the substrate. Gut Movements in Caterpillars Inspire Soft-Body Robot Design 2010-07-23T15:34:00Z Where is the center of mass of your structure? Circus Science: How to Balance Anything 2013-04-11T14:45:00.390Z Each has a mass of 70.0 kg, and each has a center of mass located 0.800 m from their locked hands. College Physics for AP Courses 2015-08-12T00:00:00Z So the center of gravity of our bodies was not the same as its center of mass. Tillie Seven mighty green tractors would lash out, seize an attacking sphere, and snap it into the center of mass of the unit of seven. Spacehounds of IPC A great telescope has recently shown that one star in eighteen on the average is a visual double—is composed of two suns in slow revolution around their common center of mass. Marvels of Modern Science Where is the center of mass for your other structures? Circus Science: How to Balance Anything 2013-04-11T14:45:00.390Z Neglect the effect of the ball on his center of mass so that his center of mass remains in his geometrical center. College Physics for AP Courses 2015-08-12T00:00:00Z When we draw a free-body diagram of a system, we represent the system’s center of mass with a single point and use vectors to indicate the forces exerted on that center of mass. College Physics for AP Courses 2015-08-12T00:00:00Z The dot represents the center of mass of the system. College Physics for AP Courses 2015-08-12T00:00:00Z The linear motion of a system can be described by the displacement, velocity, and acceleration of its center of mass. College Physics for AP Courses 2015-08-12T00:00:00Z Did you find that the center of mass of the original rectangular structure was just below the middle marshmallow? Circus Science: How to Balance Anything 2013-04-11T14:45:00.390Z The location of the center of mass contributes to the object's rotational inertia, which contributes to its angular momentum. College Physics for AP Courses 2015-08-12T00:00:00Z The swing is suspended 2.00 m above the child's center of mass. College Physics for AP Courses 2015-08-12T00:00:00Z The Moon and Earth rotate about their common center of mass, which is located about 4700 km from the center of Earth. College Physics for AP Courses 2015-08-12T00:00:00Z How is the motion of the center of mass affected by the explosion? College Physics for AP Courses 2015-08-12T00:00:00Z An object will more stably balance if a vertical line from its center of mass passes through the balance point. Circus Science: How to Balance Anything 2013-04-11T14:45:00.390Z For example, in a rigid object, this center of mass is the point where the object will stay balanced even if only supported at this point. College Physics for AP Courses 2015-08-12T00:00:00Z The shape determines the location of the center of mass. College Physics for AP Courses 2015-08-12T00:00:00Z The location of the center of mass in turn determines the angular velocity of the object. College Physics for AP Courses 2015-08-12T00:00:00Z The shape determines the location of the center of mass. College Physics for AP Courses 2015-08-12T00:00:00Z Additionally, an object should be more stably balanced if its center of mass is under the balance point, but unstable if the center of mass is above the balance point. Circus Science: How to Balance Anything 2013-04-11T14:45:00.390Z |
| 随便看 |
|
英语例句辞典收录了117811条英语例句在线翻译词条，基本涵盖了全部常用单词及词组的例句翻译及用法，是英语学习的有利工具。