An automobile is moving forwards with uniform velocity due to the force exerted by its engine. If the force is doubled with the velocity remaining constant, what happens to its total power?
Correct answer: C. It is doubled
- A. It is squared
- B. It is halved
- C. It is doubled
- D. It does not change
Explanation
Power = force * velocityWith velocity kept constant, Power is directly proportional to force. Therefore, doubling force would double power.
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About Work and Energy
Work transfers energy when a force causes displacement, while kinetic energy, gravitational potential energy and power describe motion, position and the rate of energy transfer. The work-energy theorem links net work with change in kinetic energy, and efficiency accounts for energy losses rather than treating them as energy destruction.
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