Question

if a spring pull down by 2cm its pontential energy is U but if it is pull down by 10 cm thenitd potential energy is
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Answer 1

Explanation:

Given Data  x1=2cm

Energy stored U1=U

x2=10cm

U2=?

Let Extension Produced as a spring be x initially 

in streched condition spring will have 

potentiate energy

U=21kx2

k is spring constant uαx2

u2u1=x22x12

−:u1,2u

u2u=10222⇒u2=4102u

u2=25u

∴u2=25u

Answeris 25 U

I hope it is helpful for u .