Q.
An object of mass 2 kg is moving with a velocity of 3 m/s and collide head-on with an object B of mas 1 kg moving in the opposite direction with a velocity of 4 m/s. After collision both objects coalesce so that they move with a common velocity v equal to
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a
1 m/s
b
2 m/s
c
3 m/s
d
23 m/s
answer is D.
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Detailed Solution
Applying the law of conservation of momentum2×3−1×4=(2+1)v 2=3v or V=2/3m/s
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