Unit 8 Work and Energy

Work is any change in energy. It is determined by force and distance (w=fd) and is measured in Joules. When the water bottle is at rest it's not doing any work. But when I take it off the shelf and put it on the floor it is changing energy, thus doing work. It has potential energy when it is sitting on the shelf and that changes to kinetic energy while I am moving towards the ground. Kinetic energy is the motion of energy. So basically because it is moving it has kinetic energy. When it is sitting on what is considered ground level there is no potential energy, PE=0. The ground level is relative to what the entire picture is, so it can always be changed. If you consider the floor to be ground level then that is the point of equilibrium. But if you consider that this is the third floor and make the bottom floor the point of equilibrium then the floor here has a lot of potential energy The higher an object is the more potential energy there is. So sitting on the shelf has some potential energy but if it were on the roof it would have a lot.