So you have this counteracting normal force.
这个力,也就是平行於斜面的这个地心引力的分力。
单词 | normal force |
例句 |
原声例句
可汗学院:物理 So you have this counteracting normal force. 这个力,也就是平行於斜面的这个地心引力的分力。 可汗学院:物理 And this is the normal force. 这个力,也就是平行於斜面的这个地心引力的分力。 可汗学院:物理 So this is the normal force. 所以这是支持力。 可汗学院:物理 So the normal force that I have to apply is 12.25 times the mass. 的支持力是12.25乘以质量所以这是我施加的力 乘以质量。 可汗学院:物理 So you have the normal force is equal to 9.8 times the mass divided by 0.8. 所以支持力等於9.8乘以质量9.8除以0.8等於12.25 所以我施加。 可汗学院:物理 We're sitting on the ground in the vertical direction, normal force counteracting the force of gravity. 现在考虑更多的例子。 可汗学院:物理 So the ground is providing an upwards force or normal force in this situation. 现在考虑更多的例子。 可汗学院:物理 The ground is providing a normal force, I'll do it in green. 现在考虑更多的例子。 可汗学院:物理 And I have the normal force. The rock is being supported by the ground 5 N upwards. 现在考虑更多的例子。 可汗学院:物理 5 N normal force of the ground supporting the rock. 现在考虑更多的例子。 可汗学院:物理 Similarly, the normal force is an external force but it's exactly cancelled by the gravitational force. 同样, 法向力是一种外力,但它恰好被引力抵消了。 可汗学院:物理 And there's still a normal force , the ground supporting the rock of 5 N upwards. 现在考虑更多的例子。 可汗学院:物理 People think that the normal force is always mg, we saw that that's not true. 人们认为法向力总是 mg,我们看到事实并非如此。 可汗学院:物理 It's only the normal force on this five kilogram mass that's contributing to this force of friction here. 只有作用在这个 5 千克重物上的法向力才对此处的摩擦力产生影响。 可汗学院:物理 The force of gravity is being balanced by the normal force of the ground. 现在考虑更多的例子。 可汗学院:物理 I should say the magnitude of the normal force. 这可以通过实验来求。 可汗学院:物理 People also think the normal force is always up, but it's not. 人们还认为法向力总是向上,但事实并非如此。 可汗学院:物理 We will not draw the normal force up. 我们不会绘制法向力。 Crash Course Physics 速成课物理 But if you put it on a ramp, then the normal force is pointing perpendicular to the ramp. 但是如果我们把它放在斜坡上,那么力 自然倾向于垂直于斜坡。 可汗学院:物理 It just so happens that this horizontal force depends on a vertical force, which is the normal force. 碰巧这个水平力取决于垂直力,这是法向力。 |
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