If a marble is purely rolling along a very long horizontal surface, which of the following...
If a marble is purely rolling along a very long horizontal surface, which of the following is true?
1. Linear Workfriction = Angular Workfriction
2. The marble will not stop if no air resistance
3. The speed at all edge points is identical
4. vcm = 2Rω
Which of the following does not affect the work done by the friction force when a rotating object slips along the surface prior to achieving pure rolling?
1. μk
2. m
3. R
4. ω_o
Homework Answers
(A) For pure rolling the surface will be very smooth (i.e there should be no friction between), so, answer will be The marble will not stop if no air resistance.
(B) Again the same concept is asked here, when the rotating
object achieved pure rolling then the frictional force is zero,
therefore 
does not
affect the work done.
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