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  4. A particle of mass m moving with horizontal speed 6 m / sec collides with a heavy particle of mass M moving in same direction with velocity 4 m / sec. If m < < M, then velocity of lighter particle after collision, if collision is elastic

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Q. A particle of mass $m$ moving with horizontal speed $6 \,m / sec$ collides with a heavy particle of mass M moving in same direction with velocity $4 \,m / sec$. If $m < < M$, then velocity of lighter particle after collision, if collision is elasticPhysics Question Image

Solution:

image
After collision
$e =1=\frac{4- v }{6-4}$
$4- v =2$
$V =2 \,m / s$