Question

A car having mass 700 kg is moving at a speed of 90 kilometre per hour on applied brake it speed is required to 36 km per hour in 10 second calculate the force applied by the break

Answer 1

ANSWER:-

m=mass, u=initial velocity, v=final velocity, t=time, a=acceleration, F=force

m=700kg

u=90km/h

v=36km/h

t=10s

a=v-u/t

=36-90/10

=-54/10

a=-5.4km/h²=-19.44m/s²

F=ma

=700×-19.44

F =-13608N

So, the force applied by breaks = -13608