Question

1. can you make the work output of a machine greater than the work input? (1 point) yes, by increasing the input force yes, by decreasing friction no, work output is always less than work input no, work input and work output are always equal

Explanation:

According to the law of conservation of energy, in a real - world machine, there is always some energy loss due to factors like friction. The work input is the energy put into the machine, and the work output is the useful energy the machine gives out. Since energy is lost (converted into non - useful forms like heat due to friction), the work output cannot be greater than the work input. Even if we decrease friction, we can only make the work output approach the work input (but not exceed it), and increasing the input force just changes the input work but doesn't allow the output work to exceed the input work.

Answer:

no, work output is always less than work input