. A sphere is rotated with an angular velocity v/r and lowered on a rough plank kept on a smooth surface.


A sphere is rotated with an angular velocity v/r and lowered on a rough plank kept on a smooth surface.
                           

  • (A):the sphere acquire pure rolling immediately
  • (B):the sphere takes some time to purely roll and the plank will be moving forward during that time in ground frame.
  • (C):the sphere takes some time to purely roll and the plank will be moving backwards during that time in ground frame.
  • (D):the plank does not move

Best Answer

Correct Answer:

(B): the sphere takes some time to purely roll and the plank will be moving forward during that time in ground frame.

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