What is the speed of a point of sphere in contact with the plank, if the sphere is in pure rolling motion in the given diagram? Consider the velocity of the plank to be positive.

What is the speed of a point of sphere in contact with the plank, if

1.	What is the speed of a point of sphere in contact with the plank, if the sphere is in pure rolling motion in the given diagram? Consider the velocity of the plank to be positive.
A.	+v
B.	-v
C.	0
D.	-2v
Answer» B. -v

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What is the speed of a point of sphere in contact with the plank, if the sphere is in pure rolling motion in the given diagram? Consider the velocity of the plank to be positive.

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