AP EAPCET 3 Sep 2021 Shift 2 Paper

In the arrangement shown in the figure, mA=1kg and mB=4kg. Assume that the string is light and inextensible and the pulley is smooth. If the coefficient of friction between block ' A ' and the table is 0.2, the speed of both the blocks when ' B ' has descended through a height h=1m is nearly ______ take (g=10m⋅s−2)