Question

what is the work done to increase the velocity of a car from 30km/hr to 60km/hr. if the mass of the car is 1500kg.​

Answer 1

Initial velocity    u=30 km/h=30×185=325 m/s

Final velocity    v=60 km/h=60×185=350 m/s

Mass   m=1500 kg

Work done   W=21mv2−21mu2

⟹ W=2m(v2−u2)=21500×((350)2−(325)2)=156187 J