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By Gianna, Owen, Claire, and Colin Force Force is a push or a pull Force can cause something to speed up, to slow down to change direction, or to stop moving Ex. An example of force is when a roller coaster is going down the hill Gravity Gravity is force that is always working on objects on Earth. It is the force that pulls us and everything around us toward the center of the Earth. An apple falling from a tree is an example of gravity. Gravitation Gravitation is different than gravity. It is the universal pull of all objects on one another, causing them to move closer together. Objects with larger masses have a greater pull. As distance between objects increases, gravitational pull decreases. Newtons All force is measured in newtons. A Newton is a metric unit for forces including weight. Motion Motion is measured by the change of position of an object. One example of motion is a ball rolling down a hill. During such motion, the ball’s kinetic energy is increasing and its potential energy is decreasing. Speed Speed is the measure of how far something moves during a certain period of time. Speed = distance divided by time. Average Speed Average Speed is the measure of the total distance of an object has moved div i d e d b y t h e t o t a l t i m e el a p s e d. Velocity Velocity is the speed of an object with a given direction. In physics, velocity is the measurement of the rate and direction of change in position o an object. Acceleration Acceleration is the rate of change in velocity. This can be a change in speed, direction, or both. Momentum Momentum velocity. is mass times Questions What is the measure of how far something moves during a certain period of time? A. Velocity B. Speed C. Acceleration Questions What is measured by the change of position of an object? A. Motion B. Force C. Average Speed Questions What is mass times velocity? A. Gravity B. Motion C. Momentum Questions What is the rate of change in velocity. That can be changed in speed, direction, or both? A. Acceleration B. Gravitation C. Newton