State any two important disadvantage of friction
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the friction produces heat in many parts of the machine due to which some useful energy is wasted as heat energy..
due to friction we need to posses more power in machine
it oppose the motion
may the following will help you
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Friction means roughness
Disadvantage of friction
If friction is more we can't walk or move
If friction is less we will fall down becoz of sloppiness
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