The Harness Race In a harness race, horses pull small carts with drivers around a track. The race begins from a running start: that is, the horses do not start from rest. Examine the data for two horses as they run through the straight portion of a track. Then answer the questions that follow. Time (s) Position (m) Horse 1 Horse 2 O O O 15 10 30 20 45 30 60 40 75 50 1. Graph the motion of each horse on the grid provided. 2. Calculate the velocity of each horse. 3. Which horse travelled further in 5.0 s? 4 . Which horse had the greater speed? Why? 5. Explain how you can tell which horse was moving faster from a) the table b) the graph 6. Describe the motion of each horse. 7. a) Find the position of horse 1, 8.0 s from the start. Explain how you found your answer . b) Use another method to find the position of horse 1, 9.0 s from the start.The Helicopter Challenge The table below gives the height of a radio- controlled helicopter, as recorded from a window 30 m above the ground. The helicopter flew slowly through several vertical manoeuvres and then landed safely. Use the table to answer the following questions. Time (s) Height (m) 0 -30 5 -15 10 0 15 0 20 20 25 40 30 20 35 0 40 -20 45 25 50 30 1. Draw a position-time graph to show the motion of the helicopter. Connect all the points with straight lines. 2. Write a short paragraph to describe the motion of the helicopter. 3. When was the helicopter moving up? How do you know? 4. When was the helicopter moving down? How do you know? 5. When might the helicopter have been stationary? Do you have enough information to be sure? Explain your answer. 6. Why were you told to connect all the points on your graph with straight lines? 7. How could you infer from the data that the helicopter landed safely