Newton’s Vocabulary

Term Definition
reference point An agreed upon position from which motion can be measured (ex. a tree, a building, a map or a coordinate plane).
Newton's first law An object at rest will stay at rest and an object in motion will stay in motion at a constant speed in the same direction unless acted upon by an unbalanced force.
Newton's third law For every action, there is an equal and opposite reaction.
mass The amount of matter in an object.
Kilograms A unit of measurement of mass
motion A change in position.
Newton's second law An object acted upon by an unbalanced outside force will accelerate in the direction of the force. The amount of acceleration depends upon the force applied and the mass of the object.
force A push or a pull
acceleration A change in direction and/or speed. A change in velocity.
velocity speed AND direction
speed how fast something is moving
F=MxA The force of an object is equal to its mass times its acceleration.
distance/time the formula for speed

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