A body of mass 100g moving with a velocity of 10.0ms-1 collides with a wall....
PHYSICS
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
Correct Answer: B. 1.2Ns
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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