The dot product of force and velocity is equal to:
Correct answer: A. power
- A. power
- B. impulse
- C. couple
- D. Momentum
Explanation
Velocity=distance/time Force x velocity can also be written as force x distance or time force x distance = work done so the formula can be written as Work done/time, which is the formula for power, Impulse = force x time Couple = force x distance Momentum = mass x velocity
This question appeared on the ETEA MDCAT 2011 paper, which you can sit online with every answer explained.
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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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