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science 3.2
Question | Answer |
---|---|
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 |