calculate the work required to be done to stop a car of 1500 kg moving at a velocity of 60 km//h ?

Explanation

When a moving car stops, its kinetic energy becomes zero. So, the work required to be done to stop the moving car will be equal to the kinetic energy possessed by the moving car. This can be calculated as follows.
Mass of car, m = 1500 kg
Velocity of car, v = 60 km/h
`=(60 xx 1000)/(60 xx 60) m//s`
`= (50)/(3) m//s`
Now, Kinetic energy `= (1)/(2)mv^(2)`
`=(1)/(2) xx 1500 xx ((50)/(3))^(2)`
`= (1500 xx 2500)/(2 xx 9)`
= 208333.3 J
Thus, 208333.3 joules of work has to be done to stop this moving car.