1)In last week's Homecoming victory, Al Konfurance, the star halfback of South's football team, broke a tackle at the line of scrimmage and darted upfield untouched. He averaged 9.8 m/s for an 80-yard (73 m) score. Determine the time for Al to run from the line of scrimmage to the end zone.
2)Ken Runfast is the star of the cross-country team. During a recent morning run, Ken averaged a speed of 5.8 m/s for 12.9 minutes. Ken then averaged a speed of 6.10 m/s for 7.1 minutes. Determine the total distance which Ken ran during his 20 minute jog.
3) In the qualifying round of the 50-yd freestyle in the sectional swimming championship, Dugan got an early lead by finishing the first 25.00 yd in 10.01 seconds. Dugan finished the return leg (25.00 yd distance) in 10.22 seconds.
a. Determine Dugan's average speed for the entire race.
b. Determine Dugan's average speed for the first 25.00 yd leg of the race.
c. Determine Dugan's average velocity for the entire race.
4) The position-time graph below represents the motion of South's basketball coach during the last sixteen seconds of overtime during this past weekend's game.
Use the graph to answer the next several questions.
a. Determine the total distance walked by the coach during these 16 seconds.
b. Determine the resulting displacement of the coach during these 16 seconds.
c. Determine the displacement of the coach after 12.0 seconds.
d. At what time did the coach have the greatest displacement from his starting position?
e. What was the fastest speed which the coach walked during any of the time intervals for the last 16.0 seconds?
f. What was the average speed of the coach for these 16.0 seconds?
b. Determine the resulting displacement of the coach during these 16 seconds.
c. Determine the displacement of the coach after 12.0 seconds.
d. At what time did the coach have the greatest displacement from his starting position?
e. What was the fastest speed which the coach walked during any of the time intervals for the last 16.0 seconds?
f. What was the average speed of the coach for these 16.0 seconds?
5) The position-time graph below represents the motion of two students - Mac (in red) and Tosh (in blue) - as they enter and exit the school library during a passing period.
