Friction decreases the efficiency of machines true or false give reason why
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Friction reduces efficiency because when two surfaces slide past each other, friction resists their motion, and in real machines, some input work is always used to overcome friction. ... The friction generates heat, which is an energy that should be converted in movement.
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The two cases to decrease the efficiency of machine are friction produced in the machine and the tightness of the parts of the machine and also heat generated by the work done by the machine.
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