Questions
If k is the force constant of a spring the work done [against restoring force] in increasing its extension from
a
K(l2−l1)
b
K/2(l2+l1)
c
K(l22−l12)
d
K2(l22−l12)
detailed solution
Correct option is D
W=12Kx2W2-W1=K2l22−K2l12=K2(l22−l12)Talk to our academic expert!
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If x longitudinal strain is produced in a wire of Young's modulus Y, then energy stored in the material of the wire per unit volume is
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