Questions
The potential energy of a long spring when stretched by 2 cm is U. If the spring is stretched by 8 cm the potential energy stored in it is:
detailed solution
Correct option is C
Let extension produced in a spring be x initially. In stretched condition spring will have potential energyU = 12kx2Where k is spring constant or force constant∴ U1U2 = x21x22-----------------(i)Given, U1 = U, x1 = 2 cm, x2 = 8 cmPutting these values in Eq.(i), we haveUU2 = (2)2(8)2 = 464 = 116∴ U2 = 16 UTalk to our academic expert!
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The identical springs of constant ‘K’ are connected in series and parallel as shown in figure A mass M is suspended from them. The ratio of their frequencies of vertical oscillations will be
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