Question on: JAMB Physics - 2020
Under which of the following conditions is work done?
A
A boy pushes unto a table
B
A stands on a table
C
A man supports a heavy food above his head with his hands
D
A woman holds a pot of water
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Correct Option: A
Work is done when a force causes displacement.
* **A.** A boy pushes unto a table: If the table doesn't move, no work is done.
* **B.** A stands on a table: No force is causing displacement.
* **C.** A man supports a heavy food above his head with his hands: The man is exerting a force, but there's no displacement.
* **D.** A woman holds a pot of water: The woman is exerting a force, but there is no displacement.
None of the options describe a scenario where work is done.
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