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Physics Unit

QuestionAnswer
Isaac Newton Defined the laws of motion and gravity. Tried to explain motion of the universe.
Newton's First Law An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
Newton's Second Law Force = mass x acceleration
Newton's Third Law For every action there is an equal and opposite reaction
Gravity A force that pulls objects toward each other
Mass the amount of matter in an object
Weight A measure of the force of gravity on an object
Normal Force the perpendicular contact force exerted by a SURFACE on another object
Friction A force that opposes motion between two surfaces that are in contact
Drag/Air Resistance This force is similar to friction. It opposes motion of objects moving in air or fluids.
Speed The distance an object travels per unit of time
Velocity the speed of an object in a particular direction
Terminal Velocity the constant velocity of a falling object when the force of air resistance is equal in magnitude and opposite in direction to the force of gravity
Acceleration the rate at which velocity changes over time; an object accelerates if its speed, direction, or both change
Momentum The product of an object's mass and velocity
Created by: kdidonna
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