本题目来源于试卷: gc physics textbook chapter 5 problems，类别为 IB物理学
[问答题]
Explain how a runner ev 6;vng -5a ix3id/bqnl 7i5slnm yi ez;/dj(ll nh/u;o) ib/9xperiences “free fall” or “apparent weightlessness” between stepulnmni b;l ;( i /he/o/9yjz)ds.
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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