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# science quiz motion

Newton's first law of motion An object at rest stays at rest or an object that is moving at a speed in a straight direction keeps moving at that speed unless another force acts on it
Newton's second law of motion The amount of force needed to make an object change its momentum depends on the mass of the object and the acceleration required
Newton's third law of motion For every action there is an equal and opposite action (or force)
Acceleration the rate of change in velocity
velocity describes the speed and direction of an object
Mass the amount of an object
Terminal the greatest velocity a falling object reaches
Horizontal velocity parallel to the Earth's surface
Centripetal the force on an object pulling toward the center of a circular path
Speed the rate of change in position (or rate of motion)
Rate ratio between two different quantities
Inertia property of a body that resists any change in velocity/the ability of an object to stay still or keep on going
Rest zero velocity
Momentum mass of an object multiplied by its velocity
Air Resistance upward force of air against a moving object
Vertical velocity in an up or down direction
Newtons unit of measurement for force
Force a push or pull exerted on one body by another
Forces always come in _______ pairs
Two objects with the same velocity must be moving in the same _______ direction
Gravity a force that acts on all objects on Earth
Friction the force that opposes the motion of two touching surfaces
Pressure amount of force per unit area
Created by: mikey27