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CENTRIPETAL
FORCE-CENTRIFUGAL
FORCE-CENTRIPETAL ACCELERATION
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CENTRIPETAL
FORCE
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Centripetal
force is defined as the force necessary to move a body in a
circular path and is always directed towards the centre of the circular path. |
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OR
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When
a body moves in a circular path with uniform velocity, it experiences
a force,
directed along the radius towards the centre of the circle. This force is called CENTRIPETAL FORCE. |
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MATHEMATICAL
REPRESENTATION
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| Centripetal force depends upon the mass of body, velocity of body and the radius of circular path. | |||
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CENTRIFUGAL
FORCE
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| When a body of moves around circle, centripetal force acts upon it. According Newton’s third law of motion another force equal to centripetal force but opposite in direction also acts upon it . This force is referred to as CENTRIFUGAL FORCE. | |||
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OR
The force acting in the opposite direction of centripetal force is called centrifugal force. |
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CENTRIPETAL
ACCELERATION
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| When a body moves around a circle with constant speed, the direction of its velocity continuously changes. Due to change in direction, its velocity changes. A changing velocity imparts an acceleration in the body. The direction of this acceleration is always towards the centre of circle. This acceleration is known as "CENTRIPETAL ACCELERATION". | |||
| According to 2nd law of motion | |||
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Fc = mac
..........(1)
but Fc = mv2 / r ........(2) From (1) and (2) we get mac = mv2 /r or ac = v2/r |
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UNIFORM
CIRCULAR MOTION
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| If a body moves in a circular path with constant speed or uniform speed then the motion of the body is said to be "uniform circular motion" | |||