1K20.35-Angle of Repose


Video: Instructor’s video

Description: A demonstration to show the angle of repose: the angle at which gravity overcomes the force of static friction and the block starts to slide.
Can be used to show that:
Tan(theta) = Mu sub s


  • Angle of repose apparatus (see photo)
  • Blocks of various masses and material
  • Wooden block
  • Brick
  • Block with sandpaper
  • Block with leather
  • Plastic block

Setup Procedure:

  1. Gather together all the materials; make sure everything is in working order.

Demonstration Procedure:

  1. To adjust the angle, loosen the wing nut on the apparatus.