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Under which of the following conditions is work... - JAMB Physics 2020 Question

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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