Space Time & Motion A.2 Forces & Momentum (id: 529faed5f)

本题目来源于试卷: Space Time & Motion A.2 Forces & Momentum，类别为 IB物理学

[单选题]
Two blocks of masses1wgonf9lz,7kmx9 wm* a4wy y5 uu,+u. ky+ tho$m$ and $2m$ approach each other and collide on a horizontal smooth surface. After the collision, they move together. The speeds of the blocks before the collision are $5v$ and $2v$ as shown.



Which of the following correctly gives the speed of the blocks after the collision and the nature of the collision?

A. Speed after collision is $3v$; Nature of collision is Elastic
B. Speed after collision is $\frac{v}{3}$ ; Nature of collision is Elastic
C. Speed after collision is $3v$; Nature of collision is Inelastic
D. Speed after collision is $\frac{v}{3}$ ; Nature of collision is Inelastic


参考答案:  D


本题详细解析:

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