Sean is running a 100 m dash. When the starter’s pistol fires, he leaves the starting block and continues speeding up until 6 s into the race, when he reaches his top speed of 11 m/s. He holds this speed for 2 s; then his speed slows to 10 m/s by the time he crosses the finish line 11 s after he started the race. PREPARE A GRAPH OF THIS DTA
• Time (the constant, in seconds on the X axis)
• Velocity (the variable, in m/sec) on the Y axis)
USE THE DATA FROM THE GRAPH TO ANSWER THE FOLLOWING
a. What was Sean’s average acceleration during the first 6 s of the race?
b. What was Sean’s average acceleration from 6 to 8 s into the race?
c. What was Sean’s average velocity for the whole race?
d. What was Sean’s average acceleration from 8 to 11 s into the race?