本题目来源于试卷: new new new new，类别为 IB物理学
[问答题]
Explain how a runner experiences “free fall”;-x5shswyy4u lpbgmkjzw//b:l q ;9 1 or “apparent weightlv( 1 1zf/li ua/7gwwh,.ttsvvjx9)sx essness” between stvx 1gtu)x. vhf s(l ,ai79ww/1zv/jsteps.
参考答案: When the runner
has both feet off the ground, the only force on the runner is gravity – there
is no normal force from the ground on the runner. This lack of normal force is interpreted as
“free fall” and “apparent weightlessness”.
本题详细解析:
暂无
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