presentation1.pptx contact force
TRANSCRIPT
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SHAFNA LATHEEFPHYSICAL SCIENCEReg No: 13982019
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UNIT : FORCE
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1. Contact Force
A force that can be applied only when it is in contact with an object is called contact force.
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Non- contact force
A Force that can be applied without any contact between two bodies is called non – contact force
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INTERNAL FORCEIf an internal force applied on an object the
object does not move.A slide showing the picture of internal
force .A person sit in a chair and lift the chair with out letting your legs touch the floor.
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EXTERNAL FORCEIf an external force applied on an object .An
external force alone can make an abject to move.
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BALANCED FORCE:When a number of force act on a
body ,and the resultant of these force is zero, then the force is said to Balanced force.
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UNBALANCED FORCE
When a number of force act on a body the resultant force is not zero, the force are said to be unbalanced force.
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NEWTON’S FIRST LAW
Anybody continue to be in a state of rest or of uniform motion in a straight line until a unbalanced external force is applied on it .This is Newton’s first law of motion.
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A person wear seat belt is compulsory for those who travelled in the front seat of a car
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INERTIAAn object cannot by itself change its state of rest or its
uniform motion in a straight line .This is inertia.
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A video showing the inertia .