Question

A rotating flywheel with its axis in the z direction. We consider the flywheel to be stationary and apply the equivalent radial centrifugal (inertial) force per unit volume is _____

(a) 2Πr

(b) 4Πr^2

(c) ρrω^2

(d) ρω^2

This question was addressed to me by my school principal while I was bunking the class.

My enquiry is from Finite Element Modelling in portion Axis Symmetric Solids Subjected to Axis Symmetric Loading of Finite Element Method

Answer 1

The correct option is (c) ρrω^2

Explanation: The centrifugal force is an inertial force (also called a “fictitious” or “pseudo” force) directed away from the axis of rotation that appears to act on all objects when viewed in a rotating frame of reference.