Physicsmedium · Past Paper
A boy of mass 50 kg climbs a staircase of height 10 m. What is the work done by him against gravity? (g = 10 m/s^2)
A500 J
B5000 J
C50 J
D50000 J
✓ Correct Answer: B — 5000 J
Work done against gravity is W = mgh = 50 * 10 * 10 = 5000 Joules.
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