Mass, m = 1500 kg.
Initial velocity, u = 60 kmh-1
= 60 × \(\frac{5}{18}\) = 16.67 ms-1
Final velocity, v = 0
(∵ the car comes to rest)
Work done to stop the car = change in kinetic energy
= Final kinetic energy – Initial Kinetic energy
= \(\frac{1}{2}\)mv2 - \(\frac{1}{2}\)mu2
= \(\frac{1}{2}\) x 1500 x (0)2 - \(\frac{1}{2}\) x 1500 x (16.67)2
= \(\frac{1}{2}\) x 1500 x (16.67)2
= 208333.331 J
