Physics, 03.01.2020 16:31, jack487

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.

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Based on the law of conservation of energy, how can we reasonably improve a machine's ability to do...