A rotor which is balanced statically but not dynamically is supported on two ball bearings L apart and at high speed of the rotor, reaction of 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 \[\frac{1}{2}R\]

Become equal to \[\frac{1}{4}R\]

A rotor which is balanced statically but not dynamically is supported

1.	A rotor which is balanced statically but not dynamically is supported on two ball bearings L apart and at high speed of the rotor, reaction of 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:
A.	Remain same as before
B.	Become equal to 2R
C.	Become equal to \[\frac{1}{2}R\]
D.	Become equal to \[\frac{1}{4}R\]
Answer» B. Become equal to 2R

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