Question

The tensile stress in the flywheel rim due to the centrifugal force acting on the rim is given by

(a) ρ v^2/4

(b) ρ v^2/2

(c) 3ρ v^2/4

(d) ρ v^2

The question was asked in class test.

This key question is from Energy Stored in a Flywheel in portion Turning Moment Diagrams and Flywheel of Machine Dynamics

Answer 1

Right choice is (d) ρ v^2

For explanation I would say: Tensile stress = ρ v^2

where ρ = Density of the flywheel material, and

v = Linear velocity of the flywheel.