Efficiency Practice
Flashcard
•
Physics
•
8th - 10th Grade
•
Hard
Wayground Content
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16 questions
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1.
FLASHCARD QUESTION
Front
What is the equation for efficiency of a machine?
Back
2.
FLASHCARD QUESTION
Front
What unit is used for work output?
Back
Joules (J)
3.
FLASHCARD QUESTION
Front
What unit is used for work input?
Back
Joules (J)
4.
FLASHCARD QUESTION
Front
What unit is used for efficiency?
Back
Percent (%)
5.
FLASHCARD QUESTION
Front
If a machine inputs 100 J of work and outputs 50 J, what is its efficiency?
Back
50%
6.
FLASHCARD QUESTION
Front
What does it mean if a machine has an efficiency greater than 100%?
Back
It indicates that the machine is producing more work output than the work input, which is impossible due to the conservation of energy.
7.
FLASHCARD QUESTION
Front
What is the relationship between work input and work output in a machine?
Back
Work input is the energy supplied to the machine, while work output is the energy produced by the machine.
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