The dimension of power is_______________?
Correct answer: A. [ML2T-3]
- A. [ML2T-3]
- B. [ML2T-2]
- C. [ML2T3]
- D. none of these
Explanation
Power is work divided by time. Since work has dimensions [M L2 T-2], power has dimensions [M L2 T-2]/T = [M L2 T-3], which is option a. Students may choose b because it is the dimension of work or energy, not power.
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About Power
Power is the rate at which work is done or energy is transferred, with average power calculated over a time interval and instantaneous power found from P = Fv when force and velocity are aligned. Work includes units, mechanical efficiency, and the distinction between power and total work or energy.
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