Physics: Power Worksheet
A Grade 12 Physics worksheet focusing on the concept of power, its definition, formulas, and applications.
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Physics: Power Worksheet
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Date:
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Read each question carefully and provide your answers in the space provided. Show all your work for calculation problems.
1. Which of the following is the correct definition of power?
The ability to do work.
The rate at which work is done.
The total energy expended.
The force applied over a distance.
2. The SI unit of power is the:
Joule (J)
Newton (N)
Watt (W)
Volt (V)
3. Power is the rate at which is done or energy is .
4. The formula for power can be expressed as P = W / t, where P is power, W is , and t is .
5. A motor does 1200 Joules of work in 8 seconds. Calculate the power of the motor.
6. Explain the difference between work and power, providing an example for each.
7. If work done is zero, then power must also be zero.
True
False
8. A more powerful engine will always consume more fuel than a less powerful one.
True
False
9. An elevator lifts a 500 kg mass through a height of 30 meters in 20 seconds. Calculate the power exerted by the elevator motor. (Assume g = 9.8 m/s²)
10. Consider a nuclear power plant. Explain how the concept of power is applied in the generation of electricity within such a plant.
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