Question

Khushi drives the car along with her friend at a speed of 126km/h on see a dog in her front on the road she applies brake a break that stops the car to stand still in 10seconds if all of weight along with the car 1100 kg then calculate the force exerted by the brakes on the motor car​

Answer 1

Explanation:

initial velocity(u)=126km/h=126×5/18m/s=35m/s

final velocity(v)=0m/s

time(t)=10sec

acceleration(a)=v-u/t

=0-35/10

=-35/10

= -7/2

also given that

Mass (m)=1100kg

Force =ma

= 1100×-7/2

= 3850N