This would be a physical change because it can change back to its original form. This is like ripping paper. You can piece it back together and it still is paper.
The opposite of this is chemical change. Chemical change means the product has been changed completely like burning paper. The paper has now been turned to ash and it's impossible to change this back to its original form.
A mixture is made of (elements).
The world won't go to the ball because it is a smaller figure than the earth and the ball has no gravitational force to orbit and anything the enters the earth is going to crash down to the surface onto the earth. hope this help's
a) Time taken =6.39 s
b) Angle of rotation while coming to rest = 188.17 rad
<u>Explanation:</u>
Initial angular velocity of the drum 
Angular acceleration of the drum 
a.) We know that
b.) we know that
