You are driving a metric car that has a speedometer that displays in meters per second. When you look down at your speedometer, you see that it reads 23 m/s,
then 7.4 s later you look down and it reads 13 m/s. What is your average
acceleration over those 7.4 s?
A 1.4 m/s^2
B. 1.8 m/s^2
C. -1.4 m/s^2
D. 3.1 m/s^2

During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.