Altering gear ratios can impact machine efficiency by changing the mechanical advantage, which affects energy loss as heat during energy conversion. A higher gear contact ratio may improve efficiency, although the underlying mechanics can be complex. For example, in a bicycle, low gear allows easier climbing with less pedal force but requires more revolutions, while high gear demands greater force but fewer revolutions. The total energy expended remains constant regardless of the gear used, as it is determined by the product of pedal force and revolutions. Understanding these dynamics is crucial for optimizing machine performance.
