Chapter 6
Application of Newton's Laws of Motion
第一定律:一维平衡中的粒子
Newton's first law of motion states that a body at rest remains at rest, or if in motion, remains in motion at constant velocity, unless acted on by a ...
第一定律:二维平衡中的粒子
Recall that a particle in equilibrium is one for which the external forces are balanced. Static equilibrium involves objects at rest, and dynamic ...
第二定律:相同力下的运动
Newton's laws can be applied to bodies at rest and bodies in motion. Newton's first law is applied to bodies in equilibrium, whereas the second ...
第二定律:相同加速度下的运动
Newton's second law of motion applies to bodies moving under the same acceleration. For example, when a baggage tractor pulls luggage carts, each cart ...
摩擦力
When a body is in motion, it encounters resistance because the body interacts with its surroundings. This resistance is known as friction, a common yet ...
静态和动能摩擦力
One of the simpler characteristics of sliding friction is that it is parallel to the contact surfaces between systems, and is always in a direction that ...
圆周运动动力学
An object undergoing circular motion, like a race car, is accelerating because it is changing the direction of its velocity. This centrally directed ...
圆周运动动力学:应用
Suppose a car moves on flat ground and turns to the left. The centripetal force causing the car to turn in a circular path is due to friction between the ...
阻力和终端速度
An interesting force in everyday life is the force of drag on an object when it is moving in a fluid. Like friction, the drag force always opposes the ...
张力
Tension is a force along the length of a medium, in particular, a force carried by a flexible medium, such as a rope or cable. The word "tension" ...
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