QJEEM22Ph1fdd: JEE Main 2022 Physics - Class 11 JEEM22Ph1fdd Solution: A block of mass ' m ' (as shown in figure) moving with kinetic…

A block of mass '$$\mathrm{m}$$' (as shown in figure) moving with kinetic energy E compresses a spring through a distance $$25\mathrm{cm}$$ when, its speed is halved. The value of spring constant of used spring will be $$\mathrm{nE}{\mathrm{Nm}}^{-1}$$ for $$\mathrm{n}=$$ _________.