a. Average speed = distance / total time
distance = 38 meters (going away) + 38 meters (going back) = 76 meters
total time = 9 seconds (going away) + 1.8 seconds (going back) = 10.8 seconds
Average speed = 76 meters / 10.8 seconds = 7.04 m/s
b. Average
velocity = displacement / total time
Displacement = Final position – Initial position
Initial position = 0 m
Final position = 0 m (since it gallops back to the trainer)
Displacement = 0 m – 0 m = 0
total time = 10.8 seconds
Average velocity = 0 / 10.8 = 0 m/s
