force - a push or pull, speed - how fast an object's position changes over time at any given moment, velocity - the speed and direction of an object, acceleration - a change in velocity over time, inertia - the tendency of an object in motion to stay in motion or of an object at rest to stay at rest, friction - a force between surfaces that slows objects or stops them from moving, motion - a change in an object's position, energy - the ability to do work, potential energy - stored energy- energy that is not doing work but is able to do so, kinetic energy - energy of motion, mass - how much something weights,

Unit 1: Forces and Energy

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