Piece of Cement in a Rotating Cement Mixer

  • Thread starter tahayassen
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  • #1
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Is it possible for a piece of cement in a rotating cement mixer to travel at constant speed?

If we graph a cement mixer (circle) on the Cartesian plane with a radius of 1, then at (1, 0), there would be a gravity vector pointing down and a normal force pointing towards (0, 0). Are there any other vectors that can cause the net force to point towards the centre of the cement mixer (to cancel out the gravity vector)?
 

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  • #2
The problem of resolving the forces in a cement mixer is complicated surely by the coriolis effect through the medium from the centre to the perimeter
 
  • #3
269
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The problem of resolving the forces in a cement mixer is complicated surely by the coriolis effect through the medium from the centre to the perimeter
I'm referring to a free body diagram relative to the ground.
 
  • #4
nasu
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Is it possible for a piece of cement in a rotating cement mixer to travel at constant speed?

If we graph a cement mixer (circle) on the Cartesian plane with a radius of 1, then at (1, 0), there would be a gravity vector pointing down and a normal force pointing towards (0, 0). Are there any other vectors that can cause the net force to point towards the centre of the cement mixer (to cancel out the gravity vector)?
Friction with the wall. Without friction the cement will just be at rest and the mixer will rotate nicely around it.
 

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