A ball of mass 800g moving horizontally with a speed of 5m/s hits a vertical wall and rebounds with the same speed. The impulse experienced by the ball is?

A ball of mass 800g moving horizontally with a speed of 5m/s hits a vertical wall and rebounds with the same speed. The impulse experienced by the ball is?
A. 0kgm
B. 2kgm/s
C. 4kgm/s
D. 8kgm/s

Correct Option: Answer is D

Initial momentum = (0.8) × (5)
= 4.0kgms−1
Final momentum
= (0.8) × (– 5)
= – 4.0kgms−1
Impulse on ball
= Change in momentum
= 4.0 – (– 4.0)
= 8.0.0kgms−1

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