Control Systems
By using which of the following elements, mechanical translational systems are obtained?

 spring element
All of these
 mass element
 dash-pot

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Control Systems
When deriving the transfer function of linear element

 initial conditions are taken into account but the element is assumed to be not loaded.
 both initial conditions and loading are taken into account.
 initial conditions are assumed to be zero and the element is assumed to be not loaded.
 initial conditions are assumed to be zero but loading is taken into account.

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