A body of mass 100g moving with a velocity of 10.0ms-1 collides with a wall....

JAMB 1991

A body of mass 100g moving with a velocity of 10.0ms-1 collides with a wall. If after collision, it moves with a velocity of 2.0ms-1 in the opposite direction, calculate the change in momentum.

A. 0.8Ns
B. 1.2Ns
C. 12.0Ns
D. 80.0Ns

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Correct Answer: Option B

Explanation

Initial momentum = 0.1 x 10 = 1Ns

final velocity = -2ms-1

Final momentum = -2 x 0.1 = -0.2Ns

Change in momentum = -0.2 - 1 = -1.2Ns

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A body of mass 100g moving with a velocity of 10.0ms-1 collides with a wall....

Correct Answer: Option B

Explanation

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