The dot product of force and velocity is__________________?
Correct answer: A. power
- A. power
- B. work
- C. impulse
- D. torque
Explanation
Instantaneous power is the dot product of force and velocity: P = F · v, measured in watts. Work is instead the dot product of force and displacement, W = F · d. Students may choose b by remembering the similar dot-product formula but using displacement instead of velocity.
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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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