本题目来源于试卷: Typical Forces，类别为 美国物理杯赛(Physics Bowl)
[单选题]
94.26: As shown in the acc wv-uxs,2m (ewai y-qlp w;.-u;wt;x t ompanying figure, a force F is exerted at an ang ,aes.:lufa( v4bdm6gep p w; b*g43 kdle of u(b s*da ,pm4;e4 3dawfkl .bgpgv6:e$\theta$. The block of weight mg is initially moving the right with speed $v$. The coefficient of friction between the rough floor and the block is $\mu$. The frictional force acting on the block is:
A. μmg to the left
B. μmg to the right
C. μmg − Fsin θ to the left
D. μ(mg − Fsinθ) to the right
E. μ(mg + Fsinθ) to the right
参考答案: E
本题详细解析:
暂无
| 
