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13.

Which of the following represents the state of neutral equilibrium ?                        
A. a cube resting on one edge B. a smooth cylinder lying on a curved surface
C. a smooth cylinder lying on a convex surface D. none of the above



14.

Two circular discs of same weight and thickness are made from metals having different densities. Which disc will have the larger rotational inertia about its central axis ?                        
A. disc with larger density B. disc with smaller density
C. both discs will have same rotational inertia D. none of the above



15.

The total kinetic energy of a hoop of mass 2 kg and radius 4 m sliding with linear velocity 8 m/sec and angular velocity 5 radian/sec is                        
A. 64 J B. 400 J
C. 464 J D. 89 J




16.

A symmetrical body is rotating about its axis of symmetry, its moment of inertia about the axis of rotation being 2 kg m2 and its rate of rotation 2 revolutions/see. The angular momentum of the body in kg-m2/sec is                        
A. 4 B. 6 7i
C. 8TC D. 8



17.

The angular speed of a car while taking a circular turn of radius 100m at 36 km/hour, is                        
A. 0.1 radian/sec B. 1 radian/sec
C. 100 radian/sec D. 1000 radian/sec



18.

The ratio of the speed of a rolling cylinder to the speed of sliding cylinder is                        
A. less than 1 B. equal to 1
C. between 1 and 2 D. greater than 2



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