本题目来源于试卷: gc physics textbook chapter 5 problems，类别为 通用国际物理
[问答题]
Explain how a runner experk,wx e -m5gxc8;cx7 qk9xibcivg nr84w ,bu03iences “free fall” or “apparent weightles1n wec7:,r+ lbxezr . dwn)h8psness” between e,d n lz+wb1h7cp wrn:8.xer) steps.
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
| 
