Question

a body of mass 1 kg strikes a wall with a velocity 8m/s along the normal to the wall and returns with the velocity 4m/s the impulse of the force experienced by the wall is

options
1. 4 Ns towards the wall
2. 4 Ns away from the wall
3. 12 Ns towards the wall
4. 12 Nd away from the wall
please tell with full explanation​

Answer 1

$\star\:\:\:\bf\large\underline\blue{Given:—}$

☞︎︎︎ u = 8 m/s

☞︎︎︎ v = 4 m/s

☞︎︎︎ m = 1kg

$\star\:\:\:\bf\large\underline\green{Formula:—m(v-u)}$

1 (4-8) N

-4 N

Answer:- (2) 4 N away from the wall.

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