A block of mass $m$, lying on a smooth horizontal surface, is attached to a spring (of negligible mass) of spring constant $k$. The other end of the spring is fixed, as shown in the figure. The block is initially at rest in its equilibrium position. If now the block is pulled with a constant force $F$, the maximum speed of the block is: (1) $\frac { F } { \sqrt { m k } }$ (2) $\frac { 2 F } { \sqrt { m k } }$ (3) $\frac { \pi F } { \sqrt { m k } }$ (4) $\frac { F } { \pi \sqrt { m k } }$
A block of mass $m$, lying on a smooth horizontal surface, is attached to a spring (of negligible mass) of spring constant $k$. The other end of the spring is fixed, as shown in the figure. The block is initially at rest in its equilibrium position. If now the block is pulled with a constant force $F$, the maximum speed of the block is:\\
(1) $\frac { F } { \sqrt { m k } }$\\
(2) $\frac { 2 F } { \sqrt { m k } }$\\
(3) $\frac { \pi F } { \sqrt { m k } }$\\
(4) $\frac { F } { \pi \sqrt { m k } }$