Ball Rolling in a Pipe#

A ball rolls counterclockwise around the inside of a horizontal pipe. The ball is fastest at the lowest point, slowest at the highest point.

A cross-section of a pipe with a ball rotating couterclockwise inside of it. Options A, B, C, D and E are arrows pointing right, left, down, down and to the right, and the zero vector, respectively.

Part 1#

At the point shown, with the ball moving down (the white arrow shows the ball’s instantaneous velocity), what is the direction of the net force on the ball?

Answer Section#

  • Option A

  • Option B

  • Option C

  • Option D

  • Option E


Problem is licensed under the CC-BY-NC-SA 4.0 license.
The Creative Commons 4.0 license requiring attribution-BY, non-commercial-NC, and share-alike-SA license.