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science 3.2

QuestionAnswer
machine devices that allow you to do work in an easier way
a machine makes work easier by? changing the amount distance and direction of a force
input force the force you exert
output force force machines exert
work = fore x distance
mechanical advantage number of times a machine increases a force you exerted on it
the ratio of output force to input force is the mechanical advantage of a machine
mechanical advantage= output force ----------------- input force
efficiency compares output work to input work
to calculate the efficiency of a machine you divide the output work by the input work and multiply by 100
Created by: nottingham