Gate ME-2012 Question Paper With Solutions

Q 21. A circular solid disc of uniform thickness 20 mm, radius 200 mm and mass 20 kg,
is used as a flywheel. If it rotates at 600 rpm, the kinetic energy of the flywheel,
in Joules is

(A) 395

(B) 790

(C) 1580

(D) 3160

Answer: (B)

Explanation: