In virtual work equation some forces are neglected. Select the most ap – McqOptions

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1.	In virtual work equation some forces are neglected. Select the most appropriate answer from the following:
A.	Reaction of a rough surface on a body which rolls on it without slipping.
B.	Reaction of any smooth surface with which the body is in contact.
C.	Reaction at a point or on an axis, fixed in space, around which a body is constrained to turn.
D.	All of the above
Answer» E.

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