Test Preparation on Physics-Rotation
1.
A sphere of mass 5 kg and radius 1 m rotates about a tangent. The moment of inertia of the sphere is :
2.
A solid cylinder of mass 1 kg and radius 10 cm is rotating about its natural axis. What is the moment of inertia of the cylinder?
3.
A ring of mass m and radius r is suspended from ahorizontal nail in a vertical wall in a room. The momentof inertia of the ring about the nail is :
4.
The moment of inertia of a thin uniform circular disc about one of the diameters is I. Its moment of inertia ^about an
5.
A thin uniform rod is rotating about an axis passingthrough its centre and perpendicular to its length,moment of inertia is I0. M.I. of rod about an axis throughone end and perpendicular to the rod will be:
6.
Three thin uniform rods, each of mass m and length I liealong x, y, z axes with one end of each at the origin. Themoment of inertia about the z-axis for the three rodsystem is :
7.
The moment of inertia of two bodies are l1 and I2. Theirgeometrical shapes are same, the first made of iron andthe second of aluminium, then :
8.
A naughty girl sits stationary at the back end of a longtrolley moving uniformly with speed i> on a smoothhorizontal floor. If she gets up and runs forward, then jgthe speed of the centre of mass of (trolley and girl)system :
Since, the system is isolated, no external force is acting
therefore, the speed of the C.M. does not change.
9.
A ball is rolling on a rough horizontal surface. Itgradually slows down and stops. The force of frictiontries to :
10.
The angular momentum of a projectile projected atangle q with, the horizontal with speed u about the pointof projection when it is at the highest point is :
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