A metal wire of length L is suspended vertically from a rigid support. When a body of mass M is attached to the lower end of the wire, the elongation of the wire is l.

JEE Main Physics question

A metal wire of length is suspended vertically from a rigid support. When a body of mass is attached to the lower end of the wire, the elongation of the wire is .

(A)The loss in gravitational potential energy of mass is Correct
(B)The elastic potential energy stored in the wire is
(C)The elastic potential energy stored in the wire is Correct
(D)Heat produced is Correct

Answer: (A),(C),(D)

Solution

As the mass descends by , it loses gravitational PE (A, true). At the final equilibrium elongation , the elastic PE stored is

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-154987