If a machine requires an input of 6000 J of work to put out 5000 J of work, what is the machine's efficiency? a 40% b 100% c 120% d 83%
Efficiency is defined as the ratio of output work to input work. Mathematically, it can be expressed as:
Efficiency = (Output Work / Input Work) * 100
Given that the input work is 6000 J and the output work is 5000 J, we can substitute these values into the formula to find the efficiency:
Efficiency = (5000 / 6000) * 100 = 83.33%
Rounding to the nearest whole number, the machine's efficiency is approximately 83%. Therefore, the correct answer is d) 83%.