1. About which axis a uniform cube will have minimum
moment of inertia?

2. State the principle of moments of rotational
equilibrium.

3. Find the moment of inertia of a disc of radius R and
mass m about an axis in its plane at a distance R/2 from its centre.

4. Can the couple acting on a rigid body produce
translator motion?

5. Which component of linear momentum does not contribute
to angular momentum?

6. A system is in stable equilibrium. What can we say about
its potential energy?

7. Is radius of gyration a constant quantity?

8. Two solid spheres of the same mass are made of metals
of different densities. Which of them has a large moment of inertia about the
diameter?

9. The moment of inertia of two rotating bodies A and B
are IA and IB (IA > IB) and their
angular momenta are equal. Which one has a greater kinetic energy?

10. A particle moves on a circular path with decreasing
speed. What happens to its angular momentum?

11. What is the value of instantaneous speed of the point
of contact during pure rolling?

12. Which physical quantity is conserved when a planet
revolves around the sun?

13. What is the value of torque on the planet due to the
gravitational force of sun?

14. If no external torque acts on a body, will its
angular velocity be constant?

15. Why there are two propellers in a helicopter?

16. A child sits stationary at one end of a long trolley
moving uniformly with speed V on a
smooth horizontal floor. If the child gets up and runs about on the trolley in
any manner, then what is the effect of the speed of the centre of mass of the
(trolley + child) system?