vijitha ppt
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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
THANK YOU
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