The specifications for a ceiling fan you have just bought indicate that the total moment of inertia of its blades is 0.23 kg â· m2 and they experience a net torque of 2.8 n â· m.

(a) what is the angular acceleration of the blades in rad/s2? rad/s2

(b) when the blades rotate at 205 rpm, what is the rotational kinetic energy, in joules? j

(a)12.17 rad/s

Explanation:

Given

Moment of Inertia

Torque

(a)Torque is given by Product of Moment of inertia and angular acceleration

(b)RPM of blades

angular velocity

Rotational Kinetic Energy

i think it’s a. this is because if they measured the mass of something with a mass of 150g, then their final answer would have to be approximately 150g. though all of their answers are almost 150, rosa and tran have the closest answers (or the exact answer) to the accurate one.

at positions a, g kinetic energy is maximum.

at position d, potential energy is maximum.