本题目来源于试卷: gc physics textbook chapter 6 problems，类别为 IB物理学
[问答题]
Can the normal force .caawo b0pkcxw+0zn ut l(7 86on aha9hlh 3rxr (+n object ever do work? Explain.
参考答案:
The normal force can do work on an object if the normal force has a component in the direction of displacement of an object. If someone were to jump up in the air, then the floor pushing upward on the person (the normal force) would do positive work and increase the person’s kinetic energy. Likewise when they hit the floor coming back down, the force of the floor pushing upwards (the normal force) would do negative work and decrease the person’s kinetic energy.
本题详细解析:
暂无
| 
