A car accelerates from rest to a speed of 20 m/s. If its mass is 1500 kg, what is the work done?
Q1. A car accelerates from rest to a speed of 20 m/s. If its mass is 1500 kg, what is the work done?
Answer: 300 kJ
Explanation: Work done = change in kinetic energy = 0.5 * m * (v_f^2 - v_i^2) = 0.5 * 1500 kg * (20 m/s)^2 = 300,000 J = 300 kJ.