本题目来源于试卷: Physics Unit6: Work and Energy，类别为 通用国际物理
[单选题]
You throw a ball straight /m3;fcybsi 7)*zkj 6z cg0i4jrmoa+zup. Compare the sign of the work done by goyh-5.1 md54 d+n e fask pjf:iuu+y9rravity while the ball goes up with the sign of the work done by gravity wp5a dkdfo:+e+uyh5j .-sn rf4 m9i1uyhile it goes down.
A. Work is + on the way up and + on the way down.
B. Work is + on the way up and - on the way down.
C. Work is - on the way up and + on the way down.
D. Work is - on the way up and - on the way down.
参考答案: C
本题详细解析:
暂无
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