Q

A 1 kg object falls 30 m to the ground. Find the work done by gravity. (g = 10 m/s²)

RRB Group D 19/09/2018 / Shift-I 2018
✓ Answer: B 300 J
W = mgh = 1 × 10 × 30 = 300 J. Gravity and displacement are downward.
← Previous Question Next Question →

📚 Related Questions — Mechanics

1 A 30 kg object moves uniformly at 10 m/s. Find its kinetic… 2 The fixed point about which a lever rotates is called: 3 Why is the effort distance larger in a force-multiplying pulley system? 4 In an ideal pulley system, if the load moves upward by 1… 5 Which example explains Newton’s third law of motion? 6 A constant force of 5 N does 5 J of work. Find…