There are many types of spring. Important among these are helical and spiral springs as shown in figure.
(a)
(b)
Usually, we assume that the springs are massless. Therefore, work done is stored in the spring in the form of elastic potential energy of the spring. Thus, potential energy of a spring is the energy associated with the state of compression or expansion of an elastic spring.
The ratio of spring constants of two springs is 2 : 3. What is the ratio of their potential energy, if they are stretched by the same force?
Options:
(a) 2 :3
(b) 3 :2
(c) 4: 9
(d) 9 :4