Question

Define centripetal force. Derive an expression for centripetal force ib terms of frequency

Answer 1

Centripetal force is that force which comples a body to move in circular path. it's always directed towards the center of the body.

FORMULA
F=mv^2/r

V=rw

then F becomes
F=m(rw)^2/r
F=mrw^2.........1

W=2pif
Put in eq 1

F=mr(2pif)^2

F=mr4pi^2f^2
f^2=F/mr4pi^2
f=underroot F/mr4pi^2

Answer 2

Answer:

The force which acts on an object moving along a circle and directed towards the centre of the circle is centripetal force.

This is centripetal force.