Question

ball of mass 0.5 kg moving with a velocity 5 m s–1 hits a wall normally and rebounds with half of the initial velocity. If the ball is in contact with the wall for 0.5 s, the force exerted by the wall on it is _________. 1 point a) 3.75 mN b) 3.75 × 10–2 N c) 7.5 N d) 0.375 N​

Answer 1

Answer:

Correct option is

A

2000N

ΔP=MV−(−MV)

2mV

F=

t

ΔP

=ΔP=ft

F=

10

−3

sec

2mv

10

−3

2×

2

1

×2

=2000N