Physics · Work and Energy
Kamali spends a lot of time studying for examinations, including reading books and organising thoughts. Why would a physicist argue that this 'hard work' involves very little or no 'work' in the scientific sense?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Because physical work requires displacement in the direction of the applied force, and sitting to study involves minimal physical displacement.✓
- 2Because energy is conserved, meaning the total work done must automatically be zero.
- 3Because mental effort does not require any muscular force.
- 4Because the activity is strictly considered useful physical labour.
Correct answer
Because physical work requires displacement in the direction of the applied force, and sitting to study involves minimal physical displacement.
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