The uniform $150-$lb stone $($rectangular block$)$ is being turned over on its side by pulling the vertical cable slowly upward until the stone begins to tip.

If it then falls freely $($T$=0)$ from an essentially balanced at$-$rest position, determine the speed at which the corner A strikes the pad at B$.$ The stone does not slip at its corner C as it falls. Suppose that height of the stone is L$=$L$=1\mathrm{.}4$ ft

Express your answer to three significant figures and include the appropriate units.