When a metal wire elongates by hanging a load on it, the gravitational potential energy is decreased.
(a) This energy completely appears as the increased kinetic energy of the block.
(b) This energy completely appears as the increased elastic potential energy of the wire
(c) This energy completely appears as heat.
(d) None of these.

Open in App

Solution

Correct option: (d)

None of these is the correct option. The decreased gravitational potential energy transforms partly as elastic energy, partly as kinetic energy and also in the form of dissipated heat energy.

Suggest Corrections

Similar questions

Q. When a metal wire elongates by hanging a load

M g

on it, the gravitational potential energy of mass

M

decreases by

M g l

. This energy appears.

Q. When a metal wire elongates by hanging a load on it, the gravitational potential energy is decreased

When a load is attached to the wire, the ratio of increase in elastic energy of the wire to the decrease in gravitational potential energy when load moves downwards by 1 mm, will be

Q. Assertion (A) : The elastic potential energy of a spring increases when it is elongated and decreases when it is compressed.
Reason (R) : Work done on spring is stored in it as elastic potential energy.

When a load is attached to the wire, the ratio of increase in elastic energy of the wire to the decrease in gravitational potential energy when load moves downwards by 1 mm, will be

Join BYJU'S Learning Program

Correct option: (d) None of these is the correct option. The decreased gravitational potential energy transforms partly as elastic energy, partly as kinetic energy and also in the form of dissipated heat energy.

Correct option: (d)

None of these is the correct option. The decreased gravitational potential energy transforms partly as elastic energy, partly as kinetic energy and also in the form of dissipated heat energy.