Unit 3 - Work and Power

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Physics
•
10th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
What is the definition of work in physics?
Back
Work is defined as the product of the force applied to an object and the distance over which that force is applied, in the direction of the force. It is calculated as Work = Force x Distance.
2.
FLASHCARD QUESTION
Front
What is power in the context of physics?
Back
Power is the rate at which work is done or energy is transferred over time. It is calculated as Power = Work / Time.
3.
FLASHCARD QUESTION
Front
What is the unit of work?
Back
The unit of work is the Joule (J), which is defined as the work done when a force of one newton displaces an object by one meter in the direction of the force.
4.
FLASHCARD QUESTION
Front
What is the unit of power?
Back
The unit of power is the Watt (W), which is defined as one joule per second (1 W = 1 J/s).
5.
FLASHCARD QUESTION
Front
When is work considered to be done?
Back
Work is considered to be done when a force causes a displacement in the direction of the force.
6.
FLASHCARD QUESTION
Front
What happens to work done if there is no displacement?
Back
If there is no displacement, then no work is done, regardless of the amount of force applied.
7.
FLASHCARD QUESTION
Front
How does the angle between force and displacement affect work?
Back
Work is maximized when the force is applied in the same direction as the displacement. If the angle is 90 degrees, no work is done.
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