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Science-3-2

Science-Chap. 3 Less. 2

QuestionAnswer
Input Force the force that you apply to an object
Output Force the force the object applies
Input Work the product of the input force and the distance the machine moves in the direction of the input force
Output Work the product of the output force and the distance part of the machine moves in the direction of the output force
How do machines make work easier to do? 1. change the size of the force 2. change the distance the force acts 3. change the direction of a force
Mechanical Advantage the ratio of a machine's output force produced to the input force
Mechanical Advantage formula MA=F-out F- In
Ideal Mechanical Advantage the mechanical advantage if no friction existed
Why is the output work never bigger than the input work? Friction because it converts some of the input work into thermal energy.
Efficiency the ratio of the output work to the input work
Equation for efficiency Eff=W-out W-in x 100%
Created by: 2016stamerh
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