The work done on a machine:

is always less than the work produced

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is always more than the work produced

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is equal to the work produced

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may or may not be equal to the work produced but never less

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Solution

The correct option is B may or may not be equal to the work produced but never less
$Solution :$
1. When you use a machine, you do work and the machine does work.
2. The work you do on a machine is called the work input.
3. The force you apply to the machine to do the work is the input force.
4. The work done by the machine on another object is called the work output.
5. Work done on a machine may or may not be equal to the work produced but never less.

$Hence D is the correct option$

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