If a given force (or a given system of forces) acting on a body _____ – McqOptions

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1.	If a given force (or a given system of forces) acting on a body __________ the position of the body, but keeps it in equilibrium, then its effect is to produce internal stress in the body.
A.	Change
B.	Does not change
C.	Changes periodically
D.	None of these
Answer» C. Changes periodically

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