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Physics
Physics
Problem
Which one of the following expressions represents the elastic potential energy stored in a spring of force constant
k
k
k
when it is compressed by a distance
x
x
x
? a)
k
x
2
k x^{2}
k
x
2
b)
1
2
k
x
2
\dfrac{1}{2} k x^{2}
2
1
k
x
2
c)
1
4
k
x
2
\dfrac{1}{4} k x^{2}
4
1
k
x
2
d)
3
4
k
x
2
\dfrac{3}{4} k x^{2}
4
3
k
x
2
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