Question

A 10-kg mass moving with a velocity of 20 m/s strikes a wall and is brought to rest in 0.15 s. Calculate the average stopping force in the body?

Answer 1

Answer:

Initial momentum P

i

=mu=0.1×20=2 kg m/s

Final momentum P

f

=0

Impulse I=∣P

f

−P

i

∣=∣0−2∣=2 kg m/s

Average force F=

Δt

I

=

0.1

2

=20 N