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# Chapter 6

### Forces in Motion

TermDefinition
Terminal Velocity The highest velocity achievable by a falling object. This is caused by wind resistance.
Free Fall The motion of a body when only the force of gravity is acting on the body. The object falls without wind resistance.
Projectile Motion The curved path that an object follows when thrown, launched, or otherwise projected near the surface of Earth.
Newton's First Law of Motion An object at rest stays at rest, and an object in motion stays in motion unless acted on by an outside force.
Newton's Second Law of Motion The acceleration of an object depends on the mass of the object and the amount of force applied. F = m x a (Force = mass x acceleration).
Newton's Third Law of Motion For every action there is an equal but opposite reaction.
Inertia The tendency of an object to resist changes in motion. Objects moving resist being stopped. Objects not moving resist movement.
Momentum This is the quantity defined by mass x velocity. (m x v = ?)
Created by: Kenmore Science