The collar at A can move in the vertical direction and the pin at B is forced to move in the circular guide with a radius of 300 mm. The collar and the pin is connected by an inextensible rope of 200 mm. When 0 is 60-degrees, the collar has an upwards velocity of 250 mm/s and slowing down with an acceleration of 150 mm/s2. a) Determine the acceleration and velocity of the pin at B. b) Determine the relative velocity of the pin at B with respect to the collar at A. 300 mm C A 200 mm B