Question

A small sphere is attached to a cord and rotates in a vertical circle about a point O. If the average speed of the sphere is increased, the cord is most likely to break at the orientation when the mass is at ____________.

Options

• bottom point B

• the point C

• the point D

• top point A

Answer 1

A small sphere is attached to a cord and rotates in a vertical circle about a point O. If the average speed of the sphere is increased, the cord is most likely to break at the orientation when the mass is at bottom point B.

Explanation:

The tension in the string is largest and equal to `"mv"^2/"r"` + mg at the bottom.