试题与答案

在水平桌面上沿一条直线放两个完全相同的小物块A和B(可看作质点)质量均为m,它们

题型:问答题

题目:

在水平桌面上沿一条直线放两个完全相同的小物块A和B(可看作质点)质量均为m,它们相距s.B到桌边的距离是2s.对A施以瞬间水平冲量I,使A沿A、B连线以速度v0向B运动.设两物体碰撞时间很短,碰后不再分离.为使两物体能发生碰撞,且碰撞后又不会离开桌面,求:

(1)物体A、B与水平面间的动摩擦因数μ应满足什么条件.

(2)若μ=

v20
4gs
,那么A、B碰撞过程系统损失的动能是多少?A、B停止运动时,到桌面右边缘的距离s′是多少?

答案:

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