本题目来源于试卷: Impulse and momentum，类别为 美国物理杯赛(Physics Bowl)
[单选题]
17.27: A 2.0 kg mass b(fzzavd f- m kd3+etv u e0e;m/0)t;j moves at 10.0 m/s w ,lsm4 fge o bn;bf-y50hen it has a collision in space. The mass’s speed was unchanged, eb0- b, ymg5 ;4ffolsnbut the direction of its velocity was altered by $80^{\circ}$. If the collision lasted 0.25 s, what was the magnitude of the average force exerted on the mass?
A. 0 N
B. 54.7 N
C. 102.8 N
D. 122.5 N
E. 150.3 N
参考答案: C
本题详细解析:
暂无
| 
