- Energy is defined as “the ability to do work.” Energy is how things move and change.
- In physics, work is done when a force is applied to an object over some distance in the direction of the force.
- Force is something that changes the motion or shape of an object. A force can cause an object to accelerate, slow down, remain in place, or change shape.
- If forces are balanced, the objects are not moving or are moving at a constant speed. If forces are unbalanced, then there is a greater force than the other and the object will accelerate. As long as the forces are balanced, the object keeps moving at a constant speed.
- Gravity is the force that pulls objects toward each other.
- Magnetism is the force that either attracts two objects together or repels them apart.
- Potential energy is stored energy. An apple has no kinetic energy if it is sitting on a tree, but when it begins to fall, it gains kinetic energy. The higher the apple, the more potential energy it has.
- Kinetic energy is the energy of motion. An apple has no kinetic energy if it is sitting on a tree, but when it begins to fall, it gains kinetic energy. The faster it falls, the more kinetic energy it has.
Parent Tip: Review the logic above to help your child master the concept of energy worksheet middle school.
