Show answer No Attempt 50% Part (b) Now consider a disk of mass 8 kg with radius 0.55 m. Disk rotates around itself once every 0.35 sec. What is the rotational energy of this disk?

Explanation:

Given:

mass of disk,

radius of the disk,

time taken by the disk to complete on rotation,

We know that rotational kinetic energy is given as:

............................(1)

Now the angular speed of the disk:

The moment of inertia of a disk is given as:

Now using eq. (1):

see earlier

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods