What is the work done to increase the velocity of a car from 18km/h to 90km/h if the mass of car is 2000 kg
Dear Student
Work done = Increase in Kinetic Energy
= 1/2mv2f − 1/2mv2i
= 1/2 × 2000 × [(90×5/18)2 − (18×5/18)2]
= 6×105J.
So, the work done is 6 x 105 J.
Regards