Forces:Work and Power Practice

Flashcard
•
Physics
•
8th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the definition of work in physics?
Back
Work is done when a force causes an object to move in the direction of the force. It is calculated as Work = Force x Distance.
2.
FLASHCARD QUESTION
Front
What is the formula to calculate power?
Back
Power = Work / Time.
3.
FLASHCARD QUESTION
Front
What is the standard unit of work?
Back
The standard unit of work is the Joule (J).
4.
FLASHCARD QUESTION
Front
What is the standard unit of power?
Back
The standard unit of power is the Watt (W).
5.
FLASHCARD QUESTION
Front
If a force of 10 N moves an object 3 m, how much work is done?
Back
30 J (Work = Force x Distance = 10 N x 3 m).
6.
FLASHCARD QUESTION
Front
In which scenario is work being done?
Back
When lifting a book, work is done because the book is moved against gravity.
7.
FLASHCARD QUESTION
Front
If a kitchen blender performs 3,750 Joules of work in 15 seconds, what is its power?
Back
250 W (Power = Work / Time = 3750 J / 15 s).
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