Understanding Power
A Grade 10 Science worksheet exploring concepts of power, work, and energy, with practical applications and calculations.
Includes
Standards
Understanding Power
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Date:
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Read each question carefully and answer to the best of your ability. 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 amount of energy transferred.
The force applied over a distance.
2. What is the SI unit of power?
Joule (J)
Newton (N)
Watt (W)
Kilogram (kg)
3. Power is calculated by dividing work by .
4. If a machine does 500 Joules of work in 10 seconds, its power output is Watts.
5. A motor lifts a 20 kg mass to a height of 5 meters in 4 seconds. Calculate the power developed by the motor. (Use g = 9.8 m/s²)
6. Doing more work always means more power.
True
False
7. Power is a scalar quantity.
True
False
8. Examine the image of the power plant below. Briefly explain how work and power are involved in the generation of electricity in such a facility.
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