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3 D 12652
Section C (Essay Type)

Answer any one question.
The question carries 11 marks.

20. Derive general statement of work-energy theorem for translational motion. Apply this to obtain
the escape velocity of a mass projected from earth’s surface.

21. Define potential energy :
(a) Obtain Potential energies of a uniform force field ;
(b) Obtain Potential energy of a central force ; and
(c) Obtain the Potential energy of the Three-dimensional Spring Force.

(1 x 11 = 11 marks)

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