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A push or pull extorted on an object in order to change the motion of the object; force has size and direction

Net Force

Combination of all the forces acting on an object


Tendency of an object to resist any change in motion or a moving object resisting motion until another force acts on it


A force that opposes motion between two surfaces that are in contact


A measure of the amount of matter in an object


A measure of the gravitational force exerted in an object; can change

Terminal Velocity

Constant velocity of a falling object when the force of air resistance is equal to the magnitude and direction of gravity


Force of attraction between two objects due to their masses

Air Resistance

Force that opposes motion of objects through air


SI unit for force

Free Fall

The motion of a body when only the force go gravity is acting on the body

Projectile Motion

the curved path that an object follows when thrown, launched, or otherwise projected near the Earth's surface

Newton's 1st Law

An object at rest remains at rest and an object in motion remains in motion at a constant speed in a straight line unless disturbed by an unbalanced force

Newtons 2nd Law

The acceleration of an object depends on the mass and force applied

Newton's 3rd Law

Whenever one object exerts a force on the second, the second object exerts an equal and opposite force on the first


When the net forces produce 0 N; do not cause a change in the motion of a moving object and don't cause nonmoving to move


When the net force is not 0 N; produce a change in motion such as speed or direction, necessary to cause a nonmoving to move


An objects change in position relative to a reference point


a quantity defined as the product of the mass and velocity of an object

Law of conservation of Momentum

Any time objects collide the total amount of momentum stays the same

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