1. A car travels 90.0 meters due north in 15 seconds. Then the car turns around and travels 40.0
meters due south in 5.0 seconds. What is the magnitude of the average velocity of the car
during this 20.-second interval?
2. A car initially traveling at a speed of 16 meters per second accelerates uniformly to a speed
of 20.0 meters per second over a distance of 36 meters. What is the magnitude of the car’s
acceleration?
3. The speed of a wagon increases from 2.5 meters per second to 9.0 meters per second in 3.0
seconds as it accelerates uniformly down a hill. What is the magnitude of the acceleration of
the wagon during this 3.0-second interval?
4. A ball dropped from rest falls freely until it hits the ground with a speed of 20 meters per
second.
5. How long was the ball in the air?
6. How far will a brick starting from rest fall freely in 3.0 seconds?
7. A basketball player jumped straight up to grab a rebound. If she was in the air for 0.80
second, how high did she jump?
8. Projectile A is launched horizontally at a speed of 20.0 meters per second from the top of a
10.0 m cliff and strikes a level surface below.
a. How long did it take to hit the ground?
b. How far from the base of the cliff did the projectile land?
c. What was the vertical speed of the projectile when it struck the ground?
d. What was the velocity of the projectile when it struck the ground?
9. A second projectile B is launched horizontally from the same cliff as #8. How far will it land
from the base of the cliff.
10. A ball rolls off of a table with a speed of 3.2 m/s. The table is 1.5 m high.
a) When does the ball hit the ground?
b) How far away from the base of the table does the ball travel?
c) With what speed does the ball hit the floor?
11. A ball rolls off a 1.2 m high table and lands 5 m from the base. Determine the velocity of the
ball when it left the table.