The figure shows a mass $m$ on a frictionless surface. It is connected to rigid wall by the mean of a massless spring of its constant $k$. Initially, the spring is at its natural position. If a force of constant magnitude starts acting on the block towards right, then the speed of the block when the deformation in spring is $x,$ will be
The figure shows a mass $m$ on a frictionless surface. It is connected to rigid wall by the mean of a massless spring of its constant $k$. Initially, the spring is at its natural position. If a force of constant magnitude starts acting on the block towards right, then the speed of the block when the deformation in spring is $x,$ will be
- [AIIMS 2018]
- A
$\sqrt{\frac{2 F{x}-k x^{2}}{m}}$
- B
$\sqrt{\frac{F{x}-k x^{2}}{m}}$
- C
$\sqrt{\frac{x(F-k)}{m}}$
- D
$\sqrt{\frac{F{x}-k x^{2}}{2 m}}$
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- [KVPY 2011]
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