Efficiency is defined as the
measure of the amount of work or energy is conserved in a certain process. At
all times, in every process, work or energy is always lost or wasted due
to certain interference. Not all work given is converted to useful work or
energy. Thus , efficiency is calculated by dividing the energy or
work output to the energy or work input then the value is multiplied by
100 to express efficiency as percentage.
Efficiency = (energy output / energy input)
0.50 = kinetic energy produced / 150 kcals chemical energy
kinetic energy produced = 75 kcals
