Identify the correct expression for the elastic potential energy stored in a spring…

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

Identify the correct expression for the elastic potential energy

U

stored in a spring of force constant

k

when it is compressed by a distance

x

from its natural length. (a)

U = kx^{2}

(b)

U = -\dfrac{1}{2} k x^{2}

(c)

U = \dfrac{1}{2} k x^{2}

(d)

U = \dfrac{1}{4} k x^{2}