Download - vijitha ppt
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FORCES
VIJITHA.S.KPHYSICAL SCIENCE
CANDIDATE CODE:18214301026KARMELARANI TRAINING COLLEGE KOLLAM
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WELCOME
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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 ?
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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 ?
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Contact and non contact force. Balanced and unbalanced force.
Internal and external force.
CLASSIFICATION OF FORCE
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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
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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
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The forces exchanged by the object in the system is
called internal force.
E.g. Gravitational forces
Electrical force
INTERNAL FORCE
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External forces are forces caused by external agent
outside of the system.
E.g. Applied forces
Frictional force
EXTERNAL FORCES
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Equal forces that act on an object from opposite sides. The object does not move.
BALANCED FORCE
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Unequal forces that act on an object from opposite sides. It make the object move.
UNBALANCED FORCE
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THANK YOU
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