## Theory of Machine If the rotating mass of a rim type flywheel is distributed on another rim type flywheel whose mean radius is half the mean radius of the former, then energy stored in the latter at the same speed will be

One fourth of the first one
One and a half times the first one
Four times the first one
Same as the first one

## Theory of Machine A rigid body, under the action of external forces, can be replaced by two masses placed at a fixed distance apart. The two masses form an equivalent dynamical system, if

The sum of mass moment of inertia of the masses about their center of gravity is equal to the mass moment of inertia of the body
The center of gravity of the two masses coincides with that of the body
The sum of the two masses is equal to the total mass of body
All of these

More than
None of these
Less than
Same as

## Theory of Machine A system in dynamic balance implies that

There will absolutely no wear of bearings
The system is also statically balanced
There is no critical speed in the system
The system is critically damped

## Theory of Machine For dynamic balancing of a shaft

The net dynamic force acting on the shaft is equal to zero
None of these
The net couple due to the dynamic forces acting on the shaft is equal to zero
Both (A) and (B)