Question

In case of rubber band, the work done by it in returning to its
original shape is
(a) less than the work require to deform it.
(b) greater than work require to deform it.
(c) equal to work require to deform it.
(d) All of the above.
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Answer 1

Answer:

As explained above an elastic material is one that can be deformed in shape by applying a force and returns to its original shape if the forces are removed - springs and rubber bands clearly exhibit elasticity. If an object doesn't return to its original length and shape it is inelastic.

Answer 2

Answer:

(a) less than the work require to deform it.

Explanation:

Because when the rubber band stretched, it's potential energy increased, when the force withdraw, it's potential energy started decrease , that's why the total work done during stretch is more than during deform.