Consider a basketball player spinning a ball on the tip of a finger. If a player performs 2.01J of work to set the ball spinning from rest, at what angular speed ω will the ball rotate? Model a basketball as a thin-walled hollow sphere. For a men's basketball, the ball has a circumference of 0.749 m and a mass of 0.624 kg.

The angular speed of ball is 25.9 rad/s .

Explanation:

Given :

Work done by the player , W = 2.01 J .

Mass of hollow spherical ball , m = 0.624 kg .

Circumference of hollow spherical ball , C = 0.749 m .

Therefore , its radius is ,

Now , this work done must be equal to the rotational energy of the ball .

We know ,

Therefore ,

Hence , this is the required solution .

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.