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
Ask EduPadi AI...
Correct Option: A
Work is done when a force causes a displacement. Let's analyze the options:
- A. A boy pushes unto a table: If the table does not move, no work is done because there is no displacement.
- B. A stands on a table: There's no force causing displacement in this scenario; therefore, no work is done.
- C. A man supports a heavy food above his head with his hands: While the man exerts a force to counter gravity, there's no displacement of the food (it remains stationary). Hence, no work is done.
- D. A woman holds a pot of water: Similar to option C, the woman exerts a force, but the pot isn't moving. Therefore, no work is done.
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