A 20 kg child on a swing is pulled back to a height of 2 m above the lowest point. What is the child's gravitational potential energy at this height? (g = 10 m/s²)
Q1. A 20 kg child on a swing is pulled back to a height of 2 m above the lowest point. What is the child's gravitational potential energy at this height? (g = 10 m/s²)
Answer: 400 J
Explanation: GPE = mgh = 20 kg × 10 m/s² × 2 m = 400 J. Option B fails due to miscalculation.