Question

a vehicle of mass 1000kg moving with a velocity of 40km/h collides th a piller and stops in 5 sec.calculate the force exerted by the vehicle on the pillar

Answer 1

Given
M-1000kg
u-40km/h
v-0km/h
t-5sec
We know that,
F=ma
F=m(v-u/t)
F=1000(42-0/5)
F=1000(42)/5
F=200(42)
F=8400N