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

Given, The mass of the body = 1500 kg

Velocity v = 60 km/hr

$$=\frac{60 × 1000}{3600} \$$

$$= \ \frac{50}{3}$$

The work required to stop the car = kinetic energy change of the car

$$\Rightarrow \ \frac{mv^2}{2} \ - \ \frac{m(0)^2}{2} \$$

$$\Rightarrow \frac{1500}{ ( \frac{50}{3} )^2} - 2 = 208333.3 J$$