An Ice Dancer with Her Arms Stretched Out Starts into a Spin

Multiple Choice

An ice dancer with her arms stretched out starts into a spin with an angular velocity of 1.00 rad/s. Her moment of inertia with her arms stretched out is 2.48 kg m². What is the increase in her rotational kinetic energy when she pulls in her arms to make her moment of inertia 1.40 kg m²?

A) 0.957 J
B) 0.902 J
C) 0.870 J
D) 0.750 J
E) 0.690 J