Question

efficiency is the ratio of work output to work input. it is represented as a percentage (%). the higher the percentage (%), the higher the efficiency of the machine. work input is the amount of work put into a machine. work output is the amount of work done by the machine. machines with opposing forces are objects exert on another when they touch. a virtual machine is 100% efficient and it loses no work due to friction. real machines do not exist. choose the correct answer what is the efficiency of an ideal machine? a machine with 50% efficiency a machine with 100% efficiency a machine with 150% efficiency

Explanation:

An ideal machine is defined as a machine that has no energy losses (like friction), so all the work input is converted to work output. Efficiency is calculated as (Work Output / Work Input) × 100%. For an ideal machine, Work Output = Work Input, so (Work Input / Work Input) × 100% = 100%. Machines can't have more than 100% efficiency as that would violate energy conservation, and 50% is less than ideal.

Answer:

A machine with 100% efficiency