Potential energy stored in the spring when stretched is 10 J.
Potential energy refers to the energy an object has due to its position relative to another object. When you're at the top of a staircase, you have more potential energy than at the bottom because the earth pulls you down through gravity, allowing you to do work that way. Elastic potential energy is the potential energy stored when an elastic body expands or contracts due to an external force such as stretching a spring. This is equal to the work done to stretch the spring, depending on the spring constant k and the stretched displacement.
PE = spring constant × length
PE = 1000×0.1²
PE = 10 J
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