A car accelerates from rest to 20 m/s in 4 s. What is the gain in kinetic energy if its mass is 1500 kg?
Q1. A car accelerates from rest to 20 m/s in 4 s. What is the gain in kinetic energy if its mass is 1500 kg?
Answer: 300 kJ
Explanation: Gain in KE = ½mv² = ½ × 1500 kg × (20 m/s)² = 300 kJ. Option B fails due to miscalculation.