What is the Definition of Centripetal Force in Physics
Definition of Centripetal Force
The force that causes an object to move along a curve (or a curved path) is called centripetal force.
We know that the magnitude of centripetal acceleration of a body in uniform circular motions is directly proportional to the square of velocity and inversely proportional to the radius of the path Therefore,
a(c) < v2 (Here < represents the sign of proportionality do not write this in your examination and 2 represents square of v)
a(c) < 1/r
Combining both the equations:
a(c) < v2/r
From Newton’s Second Law of Motion:
F = ma
=> F(c) = mv2/r
Fc = Centripetal Force
m = Mass of object
v = Velocity of object
r = Radius of the curved path
Factors on which Fc Depends:
Fc depends upon the following factors:
- Increase in the mass increases Fc.
- It increases with the square of velocity.
- It decreases with the increase in radius of the curved path.
- The centripetal force required by natural planets To move constantly round a circle is provided by the gravitational force of The sun.
- If a stone tied to a string is whirled in a circle, the required centripetal force is supplied to it by our hand. As a reaction the stone exerts an equal force which is felt by our hand.
- The pilot while turning his airplane tiIts one wing in the upward direction so that the air pressure may provide the required suitable Fc.
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