(a) Differentiate between speed and velocity. ( 3 ) (b) The speed versus time graph for an object is shown below: snow rm\" 02455105....\" (i) Describe the motion of the object. (ii) Calculate the total distance covered by the object in 10 5. (iii) Calculate the average speed of the object after 10 s. ( 11 ) (c) A stone is thrown horizontally off a 25 m high building. It hits the ground a distance of 20 m from the foot of the building. What is the initial velocity of the stone? (6)