1. A 75-g phonograph album of 30-cm diameter spins at 33.3 rpm. What is its kinetic energy? 2. 1/2mv^{2} 3. well i think that kinetic energy is 1/2mv^{2} so is it like that but instead of v you put in the 33.3 rpm. like 1/2(75)(33.3)^{2} maybe?
[tex] K_e = \frac{1}{2}I\omega^2 [/tex] You have to use omega as radians per second, mass has to be in kilograms.