Define centripetal acceleration and derive an expression for it
Asked by admin @ in Physics viewed by 348 People
Derive an expression for centripetal acceleration of a particle moving with uniform speed v along a circular path of radius r.
Asked by admin @ in Physics viewed by 348 People
Derive an expression for centripetal acceleration of a particle moving with uniform speed v along a circular path of radius r.
Answered by admin @
Centripetal acceleration:
If an object moves in a circle it changes its velocity i.e. it is accelerating. This acceleration is known as the centripetal acceleration.
or we can say that the centripetal acceleration is defined as the rate of change of tangential velocity.
Now we know that, the centripetal force required to keep a particle of mass ‘m’ revolving in a circular path of radius ‘r’ with a speed ‘v’ is,
F = mv 2 /r
Now, centripetal acceleration (a c ) is the radial acceleration due to the centripetal force.
Using,
a c = F/m
=> a c = [mv 2 /r]/m
=> a c = v 2 /r
The centripetal acceleration is directed along the radius in the circular motion.
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