1	SOL 4.2 Force, Motion and Energy
2	A Force A force is any push or pull that causes an object to move, stop or change speed or direction
3	May the Force Be With You The greater the force, the greater the change in motion. If you throw a ball hard, it will go faster. The bigger the object, the less effect force will have on it. A big ball will roll slower than a small ball if they are rolled with the same force.
4	More Force Unless acted on by a force, objects in motion tend to stay in motion and objects at rest remain at rest. Unless you stop a ball, it will keep rolling. Unless you kick or throw a ball, it won’t move.
5	Motion Tracing and measuring it’s position over time can describe an object’s motion Measuring how far you throw the ball can describe the distance and the force of motion.
6	More Motion Speed describes how fast an object is moving. How fast do cars drive on the highway? How fast do cars drive in a parking lot? How fast do cars drive on your street?
7	Friction and Motion Friction is the resistance to motion created by two objects moving against each other. Rub your hands together to create friction. Friction creates heat. Did your hands get hot?
8	Energy Energy exists in 2 states: Kinetic-energy in motion Potential-energy waiting to be in motion
9	Review Questions What is speed? Unless acted upon by force, objects in motion tend to_______________? What is a force? Name the 2 states of energy and describe each. The greater the force, the greater the change in ________ will be. The larger the object, the ________effect a force will be on it.