Physics · 2014
JEE Main · 12 April 2014, Shift 1 · Q5
A spring of unstretched length l has a mass m with one end fixed to a rigid support. Assuming spring to be made of a uniform wire, the kinetic energy…
A spring of unstretched length $\displaystyle l$ 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 $\displaystyle v$ is :
Official answer
(4)
$\displaystyle \frac{1}{6} \mathrm{~m} v^2$
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JEE Main 2014 Physics question, with the answer from NTA’s final answer key. Where our answers come from.