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Q.

A wooden block A of mass M is at rest on a frictionless horizontal surface. Another block of mass m, moving with a velocity v strikes the block A and sticks to it. If final velocity of the combined mass is v/3, find M/m.

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a

2

b

32

c

43

d

3

answer is B.

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Detailed Solution

Conserving linear momentum,

 (M+m)v3=M x 0+m x v⇒Mm=2

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A wooden block A of mass M is at rest on a frictionless horizontal surface. Another block of mass m, moving with a velocity v strikes the block A and sticks to it. If final velocity of the combined mass is v/3, find M/m.