An object is launched at an angle of 30 below the horizontal, from the top of a building 170 m high. Its initial speed is 40 m/s. (a) How long will it take before striking the ground? (2 marks) (b) How far from the foot of the building will the object strike? (1.5 marks) (c) At what angle to the horizon will this object strike the ground? (1.5 marks) 300 170m