Question

(1) What is centrifugal force and how is it related to centripetal force?

(2) When the centripetal force and mass of a rotating body are held constant, what will to happen to the period (T) if the radius of rotation is increased?

Answer 1

1) centrifugal force is the apparent force felt by a body in circular motion that acts outwardly away from the center of mass.

When we consider the centripetal force as an action , according to newtons third law there is an equal and opposite reaction.This reaction is the centrifugal force.

2) We have F=ma=mrw^2

Since centripetal force is kept constant, Mrw^2 will also be constant.so if radius,r increase then w^2(w=omega)decreases.

W^2 decreases means that angular velocity decreases , therefore the time period increases.