Force and Motion
Chapter 1, Section 1 Vocabulary
- Motion: An object's change in position relative to a reference point.
- Speed: The distance traveled divided by the time interval during which the motion occurred.
- Velocity: The speed of an object in a particular direction.
- Acceleration: The rate at which velocity changes over time; an ojbect accelerates if its speed, direction, or both change.
Chapter 1, Section 2 Vocabulary
- Force: A push or pull exerted on an object in order to change the motion of the object; force has size and direction.
- Newton: The SI unit for force (Symbol, N)
- Net Force: The combination of all of the forces acting on an object.
Chapter 1, Section 3 Vocabulary
- Friction: A force that opposes motion between two surfaces that are in contact.
Chapter 1, Section 4 Vocabulary
- Gravity: A force of attraction between objects that is due to their masses.
- Weight: A measure of the gravitational force exerted on an object; its value can change with the location of the object in the universe.
- Mass: A measure of the amount of matter in an object.