A car of mass 1200 kg accelerates from 10 m/s to 20 m/s. What is the increase in its kinetic energy?
Q1. A car of mass 1200 kg accelerates from 10 m/s to 20 m/s. What is the increase in its kinetic energy?
Answer: 180 kJ
Explanation: ΔKE = ½m(v₂² - v₁²) = ½ × 1200 kg × ((20 m/s)² - (10 m/s)²) = 180 kJ. Option B fails due to incorrect calculation.