GATE Mechanical Engineering (ME) 2013 Solved Paper

A link OB is rotating with a constant angular velocity of 2 rad/s in counter clockwise direction and a block is sliding radially outward on it with an uniform velocity of 0.75 m/s with respect to the rod, as shown in the figure below.If OA = 1 m, the magnitude of the absolute acceleration of the block at location A in m/s² is