first 3 parts (a)Figure B1 shows an extendable boom mobile crane, typical of the type that was used to constructthe new Engineering Building. Before the boom is retracted, distance AB = 25 m and 8 = 60°. Toretract the boom, Point B is moved toward Point A with a constant radial acceleration of -0.5 m/s²and is lowered toward the vehicle deck with a constant angular acceleration of -0.1 rad/s². At thetime t = 2 seconds after the boom begins to retract, determine:(0)The velocity of Point B(ii)(iii)AThe acceleration of Point BThe radius of curvature of the path that B follows.BFigure B1 Mobile extendable boom crane (L) and in use during construction of the EngineeringBuilding (R).(b)(i) Using the photograph of the crane on site shown in Figure B1, estimate the mass of theboom if length AB = 60 m when fully extended. The boom is manufactured from hollow boxsection steel. State any assumptions that you make.(ii) How would the mass of the boom influence the designed safe working load of the crane?1

Given: AB=25 mθ=60oaB,r=0.5 m/s2αAB=0.1 rad/s2

Figure B1 shows an extendable boom mobile crane, typical of the type that was used to construct the new Engineering Building. Before the boom is retracted, distance AB= 25 m and = 60°. To retract the boom, Point B is moved toward Point A with a constant radial acceleration of -0.5 m/s² and is lowered toward the vehicle deck with a constant angular acceleration of -0.1 rad/s². At the time t = 2 seconds after the boom begins to retract, determine: (i) The velocity of Point B (ii) (iii) The acceleration of Point B The radius of curvature of the path that B follows.