Work and Power in Physics
Grade 11 Physics worksheet covering concepts of work, power, and related calculations.
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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.
The object moves in the direction of the force.
The object moves perpendicular to the force.
Both a and b.
2. Power is defined as:
The amount of work done.
The rate at which work is done.
The force applied over a distance.
The energy an object possesses.
3. The unit of work in the SI system is the .
4. Power is calculated by dividing work by .
5. If a force of 10 N moves an object 5 meters, the work done is Joules.
6. A student pushes a wall with a force of 100 N for 10 seconds. Is any work done on the wall? Explain your answer.
7. If an object is lifted vertically, the work done against gravity depends on the path taken.
True
False
8. A motor lifts a 200 kg load to a height of 5 meters in 10 seconds. Calculate the power developed by the motor. (Assume g = 9.8 m/s²)
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