chapter 11 vocab

Newton’s First Law

Objects at rest stay at rest, and objects in motion stay in motion unless acted upon by an outside force 

Inertia

The tendency of an object to resist being moved or, if the object is moving , to resist a change in speed or direction until an outside force acts on the object 

Newton’s Second Law

Force is equal to mass multiplied by acceleration, acceleration of an object depends on the amount of force applied to it and the object's mass 

Law of Universal Gravitation

Every particle attracts every other particle in the universe with force directly proportional to the product of the masses and inversely proportional to the square of the distance between them

Free Fall

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

Weight

The force exerted on a body by gravity 

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 

Projectile motion

The curved path that an object follows when thrown, launched, or otherwise projected near the surface of Earth; the motion of objects that are moving in two dimensions under the influence of gravity 

Newton’s Third Law

For every action, there is an equal and opposite reaction 

Momentum

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