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. Since the total energy is conserved, the only way to improve its work capacity is by reducing energy that doesnt go into work.

Answer 2

Reduce the friction between its moving parts