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Physics Crossword 2

[WpProQuiz 3]

3. _______is defined as the time rate at which work is done or energy is transferred.

6.Ideally a _____ body is a body with a perfectly definite and unchanging shape. The distances between all pairs of particles of such a body do not change.

7. The notion of potential energy is applicable only to the class of forces where work done against the force gets ‘stored up’ as energy. When external constraints are removed, it manifests itself as _____ energy.

8. A stretched bow-string possesses ______ energy.

9. Coal consists of carbon and a ______of it when burnt releases about 3 × 10^7 J of energy.

11. In pure translational motion at any instant of time, all particles of the body have the same _____.

13. The total _______ energy of a system is conserved if the forces, doing work on it, are conservative.

14. To determine the motion of the centre of mass of a system no knowledge of _______ forces of the system is required.

15. The change in _____ energy of a particle is equal to the work done on it by the net force.

1. The rotational analogue of force in linear motion is moment of force. It is also referred to as ______.

2. The centre of gravity of a body coincides with its centre of mass only if the _______ field does not vary from one part of the body to the other.

4. The total torque on a system is independent of the _____ if the total external force is zero.

5. An ideal lever is essentially a light (i.e. of negligible mass) rod pivoted at a point along its length. This point is called the _______.

10. A collision in which the two particles move together after the collision is called a completely _____ collision.

12. Newton’s second law for two or three dimensions is in vector form whereas the work-energy theorem is in _____ form.

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