Mechanical Advantage and Efficiency
Flashcard
•
Physics
•
9th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the fixed point that a lever pivots around?
Back
Fulcrum
2.
FLASHCARD QUESTION
Front
What is the efficiency of a machine if the input is 263 J and the output is 142 J?
Back
54%
3.
FLASHCARD QUESTION
Front
How much effort would it take to lift Lever A?
Back
50 N
4.
FLASHCARD QUESTION
Front
What is the efficiency of a machine if 55.3 J of work are done on the machine, but only 14.3 J is produced?
Back
26%
5.
FLASHCARD QUESTION
Front
What is a rigid bar that is free to pivot, or rotate, on a fixed point?
Back
Lever
6.
FLASHCARD QUESTION
Front
Define Mechanical Advantage.
Back
Mechanical Advantage is the ratio of the output force produced by a machine to the input force applied.
7.
FLASHCARD QUESTION
Front
What is the formula for calculating efficiency?
Back
Efficiency = (Output Work / Input Work) x 100%
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