Physics
(a) What do you understand by a simple machine?
(b) State the principle of an ideal machine.
Machines
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Answer
(a) A machine is a device by which we can either overcome a large resistive force (or load) at some point by applying a small force (or effort) at a convenient point and in a desired direction or by which we can obtain a gain in speed.
(b) An ideal machine is that in which there is no loss of energy in any manner. Here, the work output is equal to the work input, i.e. its efficiency is 100%.
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