A motor car of mass 200kg is moving with a certain velocity It is brought to rest by the - Physics -

Question

A motor car of mass 200kg is moving with a certain velocity It is
brought to rest by the application of brakes, within a distance of
20 m when the average resistance being offered to it is 500N What
was the velocity of the motor car

Jyoti Pant · Accepted Answer

Given,
Mass of motor car, m=200 kgFinal velocity, v=0Distance travelled, s=20 mAcceleration, a=F/m=-500 / 200=-2
5 m/s2Using,v2-u2=2as0-u2=2×(-2
5)×20=-100or initial velocity, u=10 m/s

A motor car of mass 200kg is moving with a certain velocity. It is brought to rest by the application of brakes, within a distance of 20 m when the average resistance being offered to it is 500N. What was the velocity of the motor car.