A spring of unstretched length 1 has a mass $m$ with one end fixed to a rigid support. Assuming spring to be…

A spring of unstretched length 1 has a mass $m$ with one end fixed to a rigid support. Assuming spring to be made of a uniform wire, the kinetic energy possessed by it if its free end is pulled with uniform velocity $v$ is:
  1. $\frac{1}{2} m v^2$
  2. $\mathrm{mv}^2$
  3. $\frac{1}{3} \mathrm{mv}^2$
  4. $\frac{1}{6} m v^2$

Solution

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Asked in: JEE Main 2014 (12 Apr Online)

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