PHYSICS · Subjective · CBSE · Physics · Work, Energy and Power · Work, Energy and Power
Problem
A horizontal spring has a force constant of 150Nm−1. The spring is stretched by 8.0cm and then released.
(a) Calculate the elastic potential energy stored in the spring at this extension.
(b) If the same spring is to store four times the energy found in part (a), determine the extension required. (Assume the spring still obeys Hooke’s law.)
(c) Instead of using the original spring, a stiffer spring of force constant 300Nm−1 is stretched by the extension calculated in part (a). By what factor does the energy stored in the stiffer spring differ from that in part (a)?