试题与答案

(22分)如图,一质量m =" 1" kg的木块静止的光滑水平地面上。开始时,木

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题目:

(22分)如图,一质量m =" 1" kg的木块静止的光滑水平地面上。开始时,木块右端与墙相距L =" 0.08" m;质量为m =" 1" kg的小物块以初速度v0 =" 2" m/s滑上木板左端。木板长度可保证物块在运动过程中不与墙接触。物块与木板之间的动摩擦因数为= 0.1,木板与墙的碰撞是完全弹性的。取g =" 10" m/s2,求

(1)从物块滑上木板到两者达到共同速度时,木板与墙碰撞的次数及所用的时间;

(2)达到共同速度时木板右端与墙之间的距离。

答案:

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