An object of mass 5.0 cg moving with a velocity of 12ms-1 due north hits...

NECO 2005

An object of mass 5.0 cg moving with a velocity of 12ms^-1 due north hits a stationary body of mass 7.0kg. If they stick together after collision and move with velocity V due north, calculate the magnitude of V.

A. 12ms^-1
B. 7ms^-1
C. 6ms^-1
D. 5ms^-1
E. 4ms^-1

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Correct Answer: Option D

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