FORCES

VIJITHA.S.KPHYSICAL SCIENCE

CANDIDATE CODE:18214301026KARMELARANI TRAINING COLLEGE KOLLAM

WELCOME

A force is a push or pull. A force can give energy to an object causing the object to

start moving, stop moving or change its motion. Force has an size and direction. All motion is created by a force.

WHAT IS FORCE ?

Measured in Newton(N). The more Newton's the greater the force. One tool to measure the force of gravity is the spring

scale.

HOW IS FORCE MEASURED ?

Contact and non contact force. Balanced and unbalanced force.

Internal and external force.

CLASSIFICATION OF FORCE

A force that can be applied only when it is in contact with

an object is called a contact force.

E.g. Muscular force

Frictional force

CONTACT FORCE

A force that can be applied with out any contact between

two bodies is called noncontact force.

E.g. Magnetic force

Gravitational force

NON CONTACT FORCE

The forces exchanged by the object in the system is

called internal force.

E.g. Gravitational forces

Electrical force

INTERNAL FORCE

External forces are forces caused by external agent

outside of the system.

E.g. Applied forces

Frictional force

EXTERNAL FORCES

Equal forces that act on an object from opposite sides. The object does not move.

BALANCED FORCE

Unequal forces that act on an object from opposite sides. It make the object move.

UNBALANCED FORCE

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