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:g4t0 aeqtl. u” or 6upz(tg aqdx3 cew.*3“apparent weightlessness” between se .6xtw(zq*cu 3d3gpa teps.
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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