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

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Theory of Machine
The inversion of a mechanism is

Turning its upside down
Obtained by reversing the input and output motion
Obtained by fixing different links in a kinematic chain
Changing of a higher pair to a lower pair

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