有一道英文的物理题求大神讲解
A 1-kg ball is thrown straight up in the air.What is the
net force acting on the ball when it reaches its maximum
height?What is the ball’s acceleration at this point?
人气：386 ℃ 时间：2020-03-23 19:18:37
解答
When it reaches the summit,the net force is only gravity and no air resistance (since v=0).the instant acceleration is g.
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