Work done on a ceiling fan by gravity is _.
Correct answer: B. Zero
- A. Maximum
- B. Zero
- C. Minimum
- D. Infinity
Explanation
According to the formula, Work Done = Force x Displacement In which force and displacement should be in same direction. In case of ceiling fan , the force of gravity is downward but the fan does not displace downward so displacement becomes zero , hence work done will also be zero
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About Work
Work is done when a force produces displacement, with its value determined by the component of force along the displacement. The topic covers positive, negative and zero work, work by variable forces from force-displacement graphs, and the connection between net work and change in kinetic energy.
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