Question

A car of mass 1000 kg is moving with a velocity of 36 km/h comes to rest in 5 seconds what is the force exerted on the car solution

Answer 1

Answer: 2000 N m/s ^2

Explanation:

m = 1000kg

U = 5/18*36= 10 m/s

V = 0 ( object comes to rest)

T= 5 secs

a = v - u/t

= 2m/s^2

Now F =ma

F= 1000 * 2

= 2000 N m/s^2

Answer 2

v=u+at

as

v=0

hence u=at

a=u/t

36km/h=10m/s

a=10÷5=2m/s^2

hence F=m.a

=1000×-2

=2000N(-ve)