One end of a spring of force constant 150 dyne $\mathrm{cm}^{-1}$ is connected to a block of mass $0.2…
One end of a spring of force constant 150 dyne $\mathrm{cm}^{-1}$ is connected to a block of mass $0.2 \mathrm{~kg}$ kept on a rough horizontal surface of coefficient of friction 0.3 . The other end of the spring is connected to a rigid support as shown in the figure and the spring is initially undeformed. The maximum velocity $\mathrm{v}$ that can be given to the block so that it travels only in one direction is ____ $\mathrm{ms}^{-1}$. (Acceleration due to gravity $=10 \mathrm{~ms}^{-2}$)
