本题目来源于试卷: gc physics textbook chapter 4 problems，类别为 通用国际物理
[问答题]
When a golf ball is droxl84t 5rf3 lhvx z: /6qkdvl)bpped to the paveme) ).zqi02 v qnvjx6wmxnt, it bounces back up. (a) Is a force needed to make it bounce back up? (b) qnvq jz.6wmvix )2 0x)If so, what exerts the force?
参考答案: (a) A force is needed to bounce the ball back up, because the ball changes direction, and so accelerates. If the ball accelerates, there must be a force. (b) The pavement exerts the force on the golf ball.
本题详细解析:
暂无
| 
