A rigid object of mass and radius spins about its central axis with an angular speed of
PHYSICS · Single correct · A Level · Physics · Engineering physics · Engineering physics
Problem
A rigid object of mass 2.0kg and radius 0.30m spins about its central axis with an angular speed of 10rad/s. Its rotational kinetic energy is measured to be 9J. Which of the following objects could it be? (All objects have the same mass and radius.)
(a) A solid cylinder
(b) A thin spherical shell (hollow sphere)
(c) A thin hoop
(d) A thin rod of length 0.60m hinged at its center