Question

Based on the law of conservation of energy, how can we reasonably improve a machine’s ability to do work?
Move the machine to a different gravitational field.
Increase the friction between its moving parts.
Reduce the friction between its moving parts.
Redefine the machine’s system boundaries

Answer 1

Reduce the friction between the moving parts.
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Answer 2

Answer:C

Select the correct answer.

Based on the law of conservation of energy, how can we reasonably improve a machine’s ability to do work?

A.  

Move the machine to a different gravitational field.

B.  

Increase the friction between its moving parts.

C.  

Reduce the friction between its moving parts.

D.  

Redefine the machine’s system boundaries.

Explanation: