One end of a light spring of spring constant is fixed to a wall
PHYSICS · Multi correct · CBSE · Physics · Work, Energy and Power · Work, Energy and Power
Problem
One end of a light spring of spring constant k is fixed to a wall, and the other end is tied to a block placed on a smooth horizontal surface. During a displacement, the work done by the spring is +21kx2. The possible cases are
(1) The spring was initially compressed by a distance x and was finally at its natural length.
(2) It was initially stretched by a distance x and finally was at its natural length.
(3) It was initially at its natural length and finally in a compressed position.
(4) It was initially at its natural length and finally in a stretched position.