Questions
A spring when stretched up to 2 cm has potential energy U. If it is stretched up to 10 cm, potential energy would be
a
U /25
b
U/5
c
5 U
d
25U
detailed solution
Correct option is D
The potential energy Up of spring is given by Up=12kx2 In first case, U=12k(2)2=2k or k=U/2 In second case, Up=12k(10)2=12×U2×(10)2=25UTalk to our academic expert!
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Two springs of spring constants are joined in series. The effective spring constant of the-combination is given by:
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