Question

A motor cycle moving with a velocity of 90km/h and it takes 5second to stop after the breaks are applied . Calculate the force exerted on motor cycle if it's mass along with the rider is 200kg

Answer 1

Explanation:

Given,

Mass=200kg

Intial velocity(u) =90km/hr

=90*5/18

=25m/s

Final velocity(v) =0km/hr

Time=5s

=5/3600 hr

Acceleration(a) =(v-u) /t

=(25-0)/5*3600^1

=25*3600/5

=18000kg m/s^2

Force=mass*acceleration

=200*18000

=36*10^5N