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 potential energy of a body is increases in which of the following cases?
Options:
(a) If work is done by conservative force
(b) If work is done against conservative force
(c) If work is done by non-conservative force
(d) If work is done against non- conservative force