Newtons Laws

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

Frictional force

The force that opposes the motion of an object

Newton’s first law

An object continues in a state of rest or uniform (moving with constant) velocity unless it is acted upon by a net or resultant force

Inertia

The property of an object that causes it to resist a change in its state of rest or uniform motion

Newton’s second law

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

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