A pendulum is suspended by a string of length 250 cm. The mass of the bob of the pendulum is 200 g. The bob is pulled aside until the string is at…

A pendulum is suspended by a string of length $\displaystyle 250$ cm. The mass of the bob of the pendulum is $\displaystyle 200$ g. The bob is pulled aside until the string is at $\displaystyle 60^{\circ}$ with vertical as shown in the figure. After releasing the bob, the maximum velocity attained by the bob will be \_\_\_\_ $\displaystyle \mathrm{ms}^{-1}$. (if $\displaystyle \mathrm{g}=10 \mathrm{~m} / \mathrm{s}^2$ )