Collision and momentum conservation (id: a6e5dbd0e)

本题目来源于试卷: Collision and momentum conservation，类别为 美国物理杯赛(Physics Bowl)

[单选题]
14.15: Two objects,Aand B,xm:*j+xi2 7avqn0fj f move inktll t0ly0w. alv cm**zpo 79* space and then collide.
Before collision: Object A, of mass 5.0 g, moves to the right with a speed of 25.0m/s.
Object B, of mass 10.0 g, moves to the left with a speed of 20.0m/s.
After collision: Object A moves to the left with a speed of 25.0m/s.
What is the velocity of object B after the collision?

A. 30.0 m/s to the right
B. 20.0 m/s to the right
C. 20.0 m/s to the left
D. 5.0 m/s to the right
E. 5.0 m/s to the left


参考答案:  D


本题详细解析: 暂无

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