Kinetic energy in rotating objects.

Duely Cack

1. A 75-g phonograph album of 30-cm diameter spins at 33.3 rpm. What is its kinetic energy?

2. 1/2mv²

3. well i think that kinetic energy is 1/2mv² so is it like that but instead of v you put in the 33.3 rpm. like 1/2(75)(33.3)² maybe?

Rake-MC

[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.

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Duely Cack	Kinetic energy in rotating objects. Tweet 1. A 75-g phonograph album of 30-cm diameter spins at 33.3 rpm. What is its kinetic energy? 2. 1/2mv² 3. well i think that kinetic energy is 1/2mv² so is it like that but instead of v you put in the 33.3 rpm. like 1/2(75)(33.3)² maybe?

Rake-MC	[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.