Theory of Machine
Instantaneous center of rotation of a link in a four bar mechanism lies on

Left side pivot of this link
A point obtained by intersection on extending adjoining links
Can’t occur
Right side pivot of this link

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Theory of Machine
A rotor which is balanced statically but not dynamically is supported on two bearings L apart and at high speed of the rotor, reaction on the left bearing is R. The right side of the bearing is shifted to a new position 2L apart from the left bearing. At the same rotor speed, dynamic reaction on the left bearing in the new arrangement will

Become equal to 2R
Remain same as before
Become equal to R/2
Become equal to R/4

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