Work and Power
Flashcard
•
Physics, Mathematics
•
9th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is Work?
Back
Work is done when a force acts on an object and the object moves in the direction of the force.
2.
FLASHCARD QUESTION
Front
What is Power?
Back
Power is the rate at which work is done.
3.
FLASHCARD QUESTION
Front
What are the units of Work?
Back
The units of work are joules (J).
4.
FLASHCARD QUESTION
Front
How is Power calculated?
Back
Power is calculated by dividing the work done by the time taken to do that work (Power = Work / Time).
5.
FLASHCARD QUESTION
Front
If a weightlifter performs 660.0 J of work in 3.5 s, what is their power?
Back
Power = Work / Time = 660.0 J / 3.5 s = 189 J/s or Watts.
6.
FLASHCARD QUESTION
Front
What is the relationship between Work and Power?
Back
Power is the rate at which work is done.
7.
FLASHCARD QUESTION
Front
If you push a cart with a force of 60 N for 2 m, how much work have you done?
Back
Work = Force x Distance = 60 N x 2 m = 120 J.
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