A spring of length 25cm is extended to 30cm by a load of 150N attached to one of its end, what is the energy stored in the spring?
a
3750J
b
2500J
c
3.75J
d
2.50J
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ThankGodNwaoha
7 years ago
Natural length=25cm, total length=30cm, force=150N,
energy in string=1/2Fe where extension(e)=?
Note total length(L)=natural length+extension
sothrefor. Extension=total length-natural length
extension=30cm-25cm
sotherefor,extention=5cm/100=0.05m
substitute frm d formular(1/2Fe)
energy=1/2x150x0.05
energy=3.75J
