Physics Unit9: Static Equilibrium, Elasticity and Fracture (id: cef5838d1)

本题目来源于试卷: Physics Unit9: Static Equilibrium, Elasticity and Fracture，类别为 国际高中通用物理

[单选题]
A book weighs 6 N. When held at restd3,e -,isvrbq abovy;)dyhq)kgn 6 e your head the net force on the book isg;k q6d)h) yyn

A. 0 N.
B. 6 N.
C. 9.8 N.
D. -6 N.


参考答案:  A


本题详细解析: 暂无

微信扫一扫，分享更方便