SAT2物理练习
SAT2物理练习题
Two balls rolling friction surface, as shown above. The balls have the same mass and travel at the same speed. If the ball is met in a perfectly elastic collision, unless the following conditions
SAT2物理练习之What Are Forces
Whenever we lift something, push something, or otherwise manipulate an object, we are exerting a force. A force is defined very practically as a push or a pull—essentially it’s what makes things
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