When we lift up a weight, stretch a piece of elastic or push a box across the floor we are doing WORK and changing energy from one form to another. In each case we are pushing or pulling against a force.
The units for work are JOULES with the force in NEWTONS and the distance in
METRES.
1 JOULE of work is done when a force of 1 NEWTON is moved a distance of 1
METRE.
If 48J of work are done then 48J of energy are changed from one form of energy to others.