Question

A string wraps around a fat pipe as a bob attached to the string is made to move in a circular path in the horizontal. Assuming the speed is somehow held constant as the radius diminishes due to the wrapping, how will the centripetal force change?

• A. It will stay the same.
• B. It will diminish.
• C. It will increase
• D. None of the above (this is a jokeits got to be one of the three above)

Answer 1

The correct option is C It will increase

As the string wraps, its radius decreases. Thus the centripetal force increases.
The correct option is (c)