A body of mass 10 kg is moving with a velocity of 5 m/s. What is the work done to stop it?
Q1. A body of mass 10 kg is moving with a velocity of 5 m/s. What is the work done to stop it?
Answer: -125 J
Explanation: Work done = ΔKE = 0 - ½ × 10 kg × (5 m/s)² = -125 J. Option C fails because it's positive.