Theory of Machine
A typewriter mechanism has 7 numbers of binary joints, six links and none of higher pairs. The mechanism is

Data is not sufficient to determine same
Not sound
Soundness would depend upon which link is kept fixed
Kinematically sound

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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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