Work Energy and Power (id: 099f101c3)

本题目来源于试卷: Work Energy and Power，类别为 美国物理杯赛(Physics Bowl)

[单选题]
97.01: A force F dirtdb)b;x2m4d-t ehnv4 ected atpfx-c.b ohee -12l kvpr)f:o( an angle of θ above the horizontal is used to pull a crate a distance D across a level floor. The work done by the force le fro:hkco-b(vpe. -) f2xp1F is

A. $FD$
B. $FD cosθ $
C. $FD sinθ $
D. $ mg sinθ $
E. $mgDcosθ$


参考答案:  B


本题详细解析: 暂无

微信扫一扫，分享更方便