A body of mass 4.2kg moving with velocity 10ms-1 due east, hits a stationary body...

WAEC 1996

A body of mass 4.2kg moving with velocity 10ms^-1 due east, hits a stationary body of mass 2.8kg. If they stick together after collision and move with velocity V due east, calculate the value of V

A. 3ms^-1
B. 6ms^-1
C. 7ms^-1
D. 15ms^-1
E. 17ms^-1

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Correct Answer: Option B

Explanation

M₁U = (M₁ + M₂)V = 4.2 x 10 = (4.2 = 2.8)V

∴ V =

4.2 x 10/7.0

= 6m/s

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A body of mass 4.2kg moving with velocity 10ms-1 due east, hits a stationary body...

Correct Answer: Option B

Explanation

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