Q. 6

A person brings a mass of 1 kg from the infinity to a point A. Initially the mass was at rest but it moves at a speed of 2ms-1 as it reaches A. The work done by the person on the mass is -3 J. The potential at A is
A. -3 J Kg-1

B. -2 J Kg-1

C. -5 J Kg-1

D. None of the above

Answer :

The total work done is the sum of kinetic energy and the potential energy of the body. Here, the total work done,

Let the kinetic energy be K.E and the potential at A be V. Given, mass of the body, and speed,

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