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Physical Science

Chpt 5 vocab for final

Force A push or pull
Newton created the 3 laws of motion
Contact Forces a force between two systems that acts only when one system touches another
Field Forces the force exerted on objects by a field
Newton's 1st Law of Motion an object in motion stays in motion and an object at rest stays at rest unless acted upon by an outside force
Newton's 2nd Law of Motion the acceleration of a system is directly proportional to the net force acting on the system and is inversely proportional to its mass
Newton's 3rd Law of Motion every action has an equal and opposite reaction
Friction a contact force that opposes the movement of an object
Gravity a basic property of all matter
Force of Gravity directly proportional to each mass; inversely proportional to distance squared
Rate of Fall controlled by the ratio of the object's mass to surface area
Free Fall when an object falls with only gravity acting on it
Terminal Velocity the max. constant speed of an object falling in the atmosphere
Weight the force caused by the earth's gravity
Mass how much matter is in an object
Momentum a property of a moving object directly proportional to its mass and speed
Linear Momentum if the object is moving in a straight line
Angular Momentum if the object is turning or rotating
Impulse the product of the force and the amount of time the force is applied
Collision momentum transfers from one object to another without being lost in this process
Created by: Giraffe Girl