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Which of the following is true of real machines?
o work output is less then work input
o work output equals work input
o work input is decreased because of friction
o work output is greater than work input

Respuesta :

I think it is b , that what I would i pick

Answer:

Work output is less than work input.

Explanation:

Work output can never be greater than work input. Machines allow force to be applied over a greater distance, which means that less force will be needed for the same amount of work. When a machine changes the size of the force, the distance through which the force is exerted must also change.

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