Work and Power in Physics
Grade 12 Physics worksheet covering concepts of work, power, and their applications.
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Work and Power in Physics
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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 conditions must be met for work to be done on an object?
A force is applied to the object.
The object moves a certain distance.
The force and displacement are in the same direction.
All of the above.
2. What is the unit of power in the SI system?
Joule (J)
Newton (N)
Watt (W)
Kilogram (kg)
3. Work is defined as the product of force and , in the direction of the force.
4. Power is the rate at which is done or energy is transferred.
5. A student pushes a box with a force of 50 N over a distance of 10 m. How much work is done by the student?
6. A motor lifts a 20 kg mass to a height of 5 m in 4 seconds. Calculate the power output of the motor. (Assume g = 9.8 m/s²)
7. If you push against a wall and the wall does not move, you have done mechanical work on the wall.
True
False
8. Power is a scalar quantity.
True
False
9. Discuss the relationship between work, energy, and power. Provide a real-world example to illustrate these concepts.