Newtons Laws

Newtons Laws and Apllication of Newtons Laws.

Newtons First Law

An object continues in a state of rest or uniform 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.

Newtons 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.

Newtons Third Law

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

Different Kinds of Forces

Weight, Normal Force, Frictional Force, Applied Force, Tension

Weight (F_g)

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

Normal Force (F_N)

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

Frictional Force (F_f)

The force that opposes the motion of an object and acts parallel to the surface with which the object is in contact.