[QUE/ME-08002] ME-PROBLEM

A number of balloons are attached to a circular disk with string. Some balloons are filled with air and some balloons are filled with helium. The disk is hung freely from ceiling of a room and is disk is rotated about its center. Assuming that the disk remains horizontal while rotating, describe what happens to the balloons?

• All the balloons move away from the center of the disk.
• All the balloons move towards the center of the disk.
• Air balloons move outwards away from the center and helium balloon move towards the center.
• Air balloons move inwards towards the center and helium balloon move outwards the away from the center.

Sketch diagrams to show the balloons
(i) when the disk is hanging horizontally and is stationary.
(ii) when the disk is rotating Give a short argument in support of your answer.