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Physics
Physics
Problem
Which of the following is the correct expression for the elastic potential energy
E
E
E
stored in a spring of spring constant
k
k
k
when it is elongated by
x
x
x
? a)
E
=
k
x
2
E = kx^{2}
E
=
k
x
2
b)
E
=
1
2
k
x
2
E = \frac{1}{2}kx^{2}
E
=
2
1
k
x
2
c)
E
=
1
4
k
x
2
E = \frac{1}{4}kx^{2}
E
=
4
1
k
x
2
d)
E
=
1
3
k
x
2
E = \frac{1}{3}kx^{2}
E
=
3
1
k
x
2
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