Sometimes people are mean because they are not like you and they want to be like you. Although it's always good to try to find out why exactly someone is being mean to you, you often may never know; however, you may have a gut feeling if someone's being mean to you and you don't have to stand for it.
Thus, in SI units, a force of 1 N exerted over a distance of 1 m is 1 NÂ·m of work. The Work-Energy Theorem states that the work done on a body is equal to the change in energy of the body. 1 NÂ·m = 1 J (joule), the SI unit of energy.
Difference in Units. Energy is usually measured in Joules, the other units include ergs and calories. Power is measured in Watts, which is Joules per second, or ergs per second. Machine are usually described by its power rating, the higher the number the more powerful the machine.