Question

The steam engine has a flywheel which is having a radius of gyration of 1.1 m and mass of 2200 kg. The starting torque is 1550 Nm and assumed constant. What is the angular acceleration of the flywheel?

(a) 0.54 rad/s^2

(b) 0.58 rad/s^2

(c) 0.62 rad/s^2

(d) 0.52 rad/s^2

The question was asked in class test.

Question is taken from Flywheel topic in division Internal Combustion Engines of Automobile Engineering

Answer 1

The correct choice is (b) 0.58 rad/s^2

Easiest explanation: I = mass moment of inertia of the flywheel, m = mass of the flywheel, k = radius of gyration, T = stating torque, and α = angular acceleration of the flywheel. I = m*k^2 = 2200*1.1^2 = 2662 kg-m^2. T = I*α ⇒ 1550 = 2662 * α ⇒ α = 0.58 rad/s^2.