| 单词 | coefficient of friction |
| 例句 | The result, says Gilchrist, is cohesion that generates a negative angle of repose due to a negative coefficient of friction. Researchers make sand that flows uphill 2023-09-20T04:00:00Z The coefficient of friction between the block and the surface is 0.20. College Physics for AP Courses 2015-08-12T00:00:00Z Still, and despite their low coefficient of friction, the posts became festooned with fans, all of whom would be classified by taxonomists as people. Silliness and Scams Seem to Always Hitch a Ride with Human Activity 2018-04-11T04:00:00Z Of course, maximum grip on the desert is low, with a coefficient of friction of about 0.2, based on previous experience. Bloodhound Diary: Getting a grip for 2018 2018-02-09T05:00:00Z One of the prerequisites is a strong fault surface—a plate boundary or rock fracture with a high coefficient of friction, like a skid-resistant pad under an area rug. Shaken Beliefs: Seismic Lessons from Japan’s Tohoku Earthquake 2016-03-11T05:00:00Z A higher coefficient of friction means that there will be more friction between two surfaces, or they will be less "slippery." Phone Book Friction 2015-10-22T04:00:00Z Find her final speed at the top, given that the coefficient of friction between her skis and the snow is 0.0800. College Physics for AP Courses 2015-08-12T00:00:00Z For rubber tyres on a tarmac road, the coefficient of friction is about 1.0. Bloodhound Diary: Building a 'bullet-proof' car 2015-04-02T04:00:00Z Testing various materials for the glove by simulating a thrown football in a lab allows the manufacturer to raise the glove’s coefficient of friction as high as possible. A Lab-Perfect Reception by the Giants’ Odell Beckham Jr. 2014-11-24T05:00:00Z The degree of “stickiness” between two surfaces is expressed mathematically as the coefficient of friction. Let’s make an effort to move more freight by rail and less by road. Trains are more efficient. 2014-03-03T21:45:18Z In physics the frictional force between two surfaces is determined by something called the coefficient of friction. Phone Book Friction 2015-10-22T04:00:00Z A minimum coefficient of friction is needed, or the car will move in a larger-radius curve and leave the roadway. College Physics for AP Courses 2015-08-12T00:00:00Z The goal, Thurman said, is to reduce the coefficient of friction between the strings and allow them to move more, which creates more force when they snap back. Building a Better Racket: Latest Advances to Tennis Racket Put New Spin on the Game 2012-08-26T04:11:11Z In all cases the coefficient of friction is shown to increase with the percentage of slip. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z To calculate the force of friction, one must multiply the coefficient of friction by the force generated by the object, which was the mass of the tub in the pull of gravity. Fight Slippage with Friction 2012-01-19T15:15:00.180Z The move from atoms to bits reduces the coefficient of friction of entire industries to zero. Goodbye Information Economy, Hello Feedback Economy 2012-01-05T17:58:25Z However, many parts of the body, especially the joints, have much smaller coefficients of friction—often three or four times less than ice. College Physics for AP Courses 2015-08-12T00:00:00Z The coefficient of friction will be thereby reduced; slipping will ensue, and the transmission may cease either in whole or in part. The Energy System of Matter A Deduction from Terrestrial Energy Phenomena 2011-12-21T03:00:36.570Z The diameter of the pulley also appears to affect the coefficient of friction to some extent. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z Although the mass of the tub and gravity did not change, the coefficient of friction of the two ramp systems did. Fight Slippage with Friction 2012-01-19T15:15:00.180Z A coefficient of friction of about 15% is assumed in their design, and this estimate is confirmed by their operation. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z Calculate the deceleration of a snow boarder going up a 5.0º , slope assuming the coefficient of friction for waxed wood on wet snow. College Physics for AP Courses 2015-08-12T00:00:00Z The work done is independent of the length of the journal; except as it may modify pressure, and thus the coefficient of friction. Friction, Lubrication and the Lubricants in Horology 2011-01-20T03:00:07.073Z That when suddenly forced to slip, the coefficient of friction becomes momentarily very high, but that it gradually decreases as the slip continues. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z The resistance that occurs depends on a value called the coefficient of friction. Fight Slippage with Friction 2012-01-19T15:15:00.180Z The determination of the actual friction or coefficient of friction between the surfaces of the pile and the material it encounters, is not difficult to determine. Pressure, Resistance, and Stability of Earth American Society of Civil Engineers: Transactions, Paper No. 1174, Volume LXX, December 1910 The tangent of the angle of friction is the coefficient of friction. The Birth-Time of the World and Other Scientific Essays The coefficient of friction is that quantity which, being multiplied by the total pressure acting normally to the surfaces in contact, will give the measure of the maximum frictional resistance to motion. Friction, Lubrication and the Lubricants in Horology 2011-01-20T03:00:07.073Z The highest allowable coefficient of friction for this belt is therefore estimated to be somewhere between 1.13 and .995, or we may safely say 1. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z An advantage of wood pipe for conveying water is its low coefficient of friction. The Water Supply of the El Paso and Southwestern Railway from Carrizozo to Santa Rosa, N. Mex. American Society of Civil Engineers: Transactions, No. 1170 Hence, for the belt to remain at rest with two fixed weights, Q and P, it is necessary that the coefficient of friction should be exactly constant. Scientific American Supplement, No. 415, December 15, 1883 I can determine the coefficient of friction from the angle of friction by taking the tangent of the angle. The Birth-Time of the World and Other Scientific Essays "When the oil is perfectly fresh, agate and steel have a very low coefficient of friction." Friction, Lubrication and the Lubricants in Horology 2011-01-20T03:00:07.073Z If the coefficient of friction does vary with the intensity of pressure, the problem of determining the driving power of a belt on strictly mathematical principles will indeed be complicated. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z This extreme variation in the coefficient of friction does not give rise, as might at first be supposed, to such a great difference in the transmission of power. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z The coefficient of friction varies with the condition of lubrication of the surface of the pulley, which alters during the running and with every change in the velocity and temperature of the rubbing surfaces. Scientific American Supplement, No. 415, December 15, 1883 They therefore give us the true coefficient of friction of metal on ice. The Birth-Time of the World and Other Scientific Essays The lowest possible coefficient of friction under the conditions in actual use, i. e., the sum of the two components, solid and fluid friction, should be a minimum. Friction, Lubrication and the Lubricants in Horology 2011-01-20T03:00:07.073Z The coefficient of friction .40, adopted by Mr. Nagle, appears from these experiments to be on the safe side for all working requirements, except in cases where dry belts are run at slow speeds. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z The chief lubricants used are oil and tallow, which have a less coefficient of friction than the parts in contact. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z Similarly for any increase of the coefficient of friction, the spring in Fig. Scientific American Supplement, No. 415, December 15, 1883 It may be well now to state that the term ‘coefficient of friction’ is an expression which indicates the proportion which resistance to sliding bears to the force which presses the surfaces together. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z In other words, the lower the coefficient of friction on the two surfaces the less the power required to force one into the other, the gauge diameters being equal. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z |
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