The graph show the behaviour of a length of wire in the region for which the substances obeys Hooke's law. `P` and `Q` represent

Options

A. P=applied force, Q=extension
B. P=extension, Q=applied force
C. P=extension, Q=stored elastic energy
D. P=stored elastic energy, Q=extension

Answer

C

Explanation

(c) Graph between applied force and extension will be straight line because in elastic range,
Applied force `prop` extension
but the graph given in parabolic in nature
So, it will be between extension and stored elastic energy As `U=1//2 kx^(2)`or `U prop x^(2)`