Newtons Laws Definitions

Vector

a physical quantity which has magnitude and direction

Scalar

A physical quantity which has magnitude only.

Resultant Vector

a single vector that has the same effect as the original vectors acting together

Displacement

change in position of a body

Weight

The gravitational force the earth exerts on any object on or near its surface

Normal Force

The perpendicular force exerted by a surface on an object in contact with it

Friction

a force that opposes the motion, or possible motion, of an object

Newton's First Law

An object continues in a state of rest or uniform velocity unless it is acted upon by a net force

Newton's Second Law

When a net force is applied to an object, it accelerates in the direction of the net force. The acceleration is directly proportional to the net force and inversely proportional to the mass of the object

Inertia

The property of a body that resists any change in its state of rest or motion

Newton's Third Law

When object A exerts a force on object B, object B simultaneously exerts an oppositely directed force of equal magnitude on object A