Under which conditions is work done - 641 - JAMB Physics 2024 Question
Under which conditions is work done
A
A man supports a heavy load on his head with hands.
B
A woman holds a pot of water
C
A boy climbs onto a table
D
A man pushes against a stationary petrol tanker
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Correct Option: C
Work is done when a force causes a displacement.
- A: The man is applying a force, but there is no displacement of the load (it remains stationary).
- B: The woman applies a force, but there's no displacement.
- C: The boy applies a force to climb, and there is a displacement in the vertical direction. Thus, work is done.
- D: The man applies a force, but the tanker does not move (no displacement).
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