2.
The essential condition of placing the two masses, so that the system becomes dynamically equivalent, is (where $${l_1}$$ and $${l_2}$$ = Distance of two masses from the centre of gravity of the body and kG = Radius of gyration of the body)

3.
The natural frequency of free longitudinal vibrations is equal to (where m = Mass of the body, s = Stiffness of the body and $$\delta $$ = Static deflection of the body)

4.
The pitching of a ship produces forces on the bearings which act __________ to the motion of the ship.

5.
When two pulleys of different diameters are connected by means of an open belt, the angle of contact at the ________ pulley must be taken into consideration.

6.
The Ackermann steering mechanism is preferred to the Davis type in automobiles because

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