1. Chapter 18 Test Review

2. What is a reference point? The object that stays in place in relation to a moving object.

3. What 3 factors describe motion? Position, direction of motion, and speed.

4. What is the equation for acceleration? Average acceleration = Final velocity - starting velocity time it takes to change velocity

5. What is the equation for average speed? Average speed = total distance total time

6. What factors affect an object’s gravitational force? Masses of the objects and distance of the objects.

7. How do you find the net force of an object? Combine all forces acting on an object.

8. Compare speed and velocity. Velocity must have a direction. Both are the distance an object travels divided by the time it takes.

9. What is the affect of an unbalanced force? A balanced force? An unbalanced force will cause a change in motion, speed, or direction. A balanced force will not cause change.

10. When graphing acceleration or speed: what does an upward slope mean, what does a downward slope mean? Upward slope = increase in acceleration, Downward slope = decrease in acceleration.

11. Magnetic force: The force that pushes magnets apart or pulls them together. Motion: object’s change in position relative to a reference point. Gravity: The force of attraction between objects that is due to their mass. Friction: a force that always acts to oppose motion. Electric Force: The force that pushes or pulls charged objects

12. Speed: the distance traveled over time. Velocity: distance and direction traveled over time. Law of Universal Gravitation: idea that all objects in the universe attract each other through gravitational force. Acceleration: a change in a moving object’s speed or direction. Force: a push or pull that always acts on an object.