Experiment number two explores this concept. Experiment number two also will look at this further. Energy TOC Energy is a very interesting topic to discuss because energy comes in so many different forms. In this unit we will discuss just two types of energy, potential and kinetic. Energy is that entity in our universe which allows us to do work.
Work is done when a force acts through a distance.
A sixty watt light bulb uses about sixty joules of electrical energy every second. Gravitational Potential Energy is the energy that an object has due to its position in the Earth's gravitational field. If you drop a rock on your foot it hurts more the further the rock falls. This is because the higher the rock above your foot the more potential energy it has. Kinetic Energy is the energy an object has due to its mass and velocity.