2. A portion of a machine consists of a bar AB, 1 m long with smooth sliders on both ends. The bar moves in the vertical plane such that slider A follows a vertical guide and slider B follows an inclined guide of angle a with the ground, as shown in the diagram. At the instant when 0 = 60 and a = 30 slider A is driven downward with a speed of 0.5 m/s and this downward velocity is decreasing at the rate of 0.05 m/s. Find the velocity and acceleration of end B at this instant. A x B Figure 2: A portion of a machine