6 A girl is riding a bicycle at a constant velocity of 3.0ms-1 along a straight road. At time t = 0, she passes a boy sitting on a stationary bicycle. At time t = 0, the boy sets off to catch up with the girl. His velocity increases from time t =0 until t = 5.0s, when he has covered a distance of 10 m. He then continues at a constant velocity of 4.0ms-1 Draw the displacement-time graph for the girl from t = 0 to 12 s. b On the same graph axes, draw the displacement-time graph for the boy. c Using your graph, determine the value of t when the boy catches up with the girl.
