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romija kulberga

on 27 January 2016

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Transcript of LEVER

example 2
what is a lever ?
A lever is a rigid bar resting on a pivot used to move heavy things with one end when pressure is applied to other
example 1
a simple machine we use to cut
paper and other things
example 2
Remember to use scissors safely
The vector sum of the external forces f on an object is equal to the mass m of that object multiplied by the acceleration vector a of the object: f = ma.
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