Typical Forces (id: 97d7f9916)

本题目来源于试卷: Typical Forces，类别为 美国物理杯赛(Physics Bowl)

[单选题]
08.20: A person pushes a block of massemjab1pll0lk s4,9 e/ M=6.0 kg with a ca;. 0:tq 83 bxpxwjadbonstant speed of 5.0 m/s straight up a flat surface incbxd0 ta:3q bxj8;pwa.lined $30^{\circ}$above the horizontal. The coefficient of kinetic friction between the block and the surface is μ = 0.40. What is the net force acting on the block?

A. 0N
B. 21N
C. 30N
D. 51N
E. 76N


参考答案:  A


本题详细解析: 暂无

微信扫一扫，分享更方便