Two springs of spring constants ' $\mathrm{K}^{\prime}$ and ' $2 \mathrm{~K}^{\prime}$ are stretched by same…

Two springs of spring constants ' $\mathrm{K}^{\prime}$ and ' $2 \mathrm{~K}^{\prime}$ are stretched by same force. If ' $\mathrm{w}_{1}{ }^{\circ}$ and ' $\mathrm{w}_{2}$ ' are the energies stored in them respectively then
  1. $\mathrm{w}_{1}=2 \mathrm{w}_{2}$
  2. $\mathrm{w}_{1}=\frac{\mathrm{w}_{2}}{4}$
  3. $\mathrm{w}_{2}=2 \mathrm{w}_{1}$
  4. $\mathrm{w}_{1}=\mathrm{w}_{2}$

Solution

Energy stored in spring of $w_{1}=\frac{1}{2} k x^{2} \text { constant } k$ Th spring of contant 2k $w_{2}=\frac{1}{2} (2k) x^{2} \text { constant } k$ So, $w_{2}=2w_{1}$

Asked in: MHT CET 2020 (13 Oct Shift 1)

Practice more Work Power Energy questions on Aicharya