CENTRIPETAL FORCE-CENTRIFUGAL FORCE-CENTRIPETAL ACCELERATION
 
 
 
CENTRIPETAL FORCE
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.
OR
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.
          
MATHEMATICAL REPRESENTATION
 Centripetal force depends upon the mass of body, velocity of body and the radius of circular path.
CENTRIFUGAL FORCE
 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.
OR
The force acting in the opposite direction of centripetal force is called centrifugal force.
CENTRIPETAL ACCELERATION
 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
Fc = mac ..........(1)
but
Fc = mv2 / r ........(2)
From (1) and (2)
we get
mac = mv2 /r
or
ac = v2/r
UNIFORM CIRCULAR MOTION
 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"
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