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

Mass of the car (m) = 1500 kg

Velocity of the car (v) = 60 km/h

=${60×1000\over60×60}={50\over3}$m/s

The car is in motion, so its energy = kinetic energy = ${1\over2}$𝑚𝑣²

=${1\over2}$(1500) $({ 50\over3 })^2$ J

=${1\over2}× (1500) × {2500\over9}$ J

= 208333.3 J

The kinetic energy of the car, when it comes to rest = 0 J

Work done on object  = change in kinetic energy

= 208333.3 − 0 J

= 208333.3 J

Hence, the work required to stop the car is 208333.3 J.