Name: ____________________________________
1st quarter review test
ON SEPARATE SHEET OF PAPER SHOW ALL WORK INCLUDING EQUATIONS AND SUBSTITUTIONS WITH
UNITS
1. Figure 2-20 is the position-time graph for a squirrel running along a clothesline.
Figure 2.20
(a) What is the squirrel's displacement during the time interval from t = 0.0 s to t = 2.5 s?
(b) What is the squirrel's average velocity during this interval?
2. Sally travels by car from one city to another. She drives for 45.0 min at 80 km/h, 12 min at 105 km/h,
and 45 min at 40 km/h. She spends 17.0 min eating lunch and buying gas.
(a) Determine the average speed for the trip.
(b) Determine the total distance traveled.
3.
The graph below represents the motion of an object.
According to the graph, as time increases, the velocity of the object does what?
increases
remains the same
decreases
4. A race car accelerates from rest at +7.7 m/s2 for 4.4 s. How fast will it be going at the end of that
time?
5. How far does a plane fly in 15 s while its velocity is changing from 140 m/s to 75 m/s at a uniform rate
of acceleration?
6. A skater increases her speed uniformly from 2.0 meters per second to 7.0 meters per second over a
distance of 12 meters. What is the magnitude of her acceleration as she travels this 12 meters?
2.2 m/s2
2.4 m/s2
1.9 m/s2
3.8 m/s2
7. A ball thrown vertically upward is caught by the thrower after 9.4 s.
(a) Find the initial velocity of the ball.
(b) Find the maximum height it reaches.
8. A small sandbag is dropped from rest from a hovering hot-air balloon. (Assume the positive direction
is upward.)
(a) After 1.5 s, what is the velocity of the sandbag?
(b) After 1.5 s, how far below the hot-air balloon is the sand bag?
9. Which pair of graphs represent the same motion?
10. A ball thrown vertically upward reaches a maximum height of 30. meters above the surface of Earth.
At its maximum height, what is the speed of the ball?
3.1 m/s
9.8 m/s
24 m/s
0.0 m/s
11. A steel ball rolls with a constant velocity across a table top 0.965 m high. It rolls off and hits the
ground +0.442 m horizontally from the edge of the table. How fast was the ball rolling?
12. A child kicks a ball with an initial velocity of 8.5 meters per second at an angle of 35° with the
horizontal, as shown. The ball has an initial vertical velocity of 4.9 meters per second and a total time of
flight of 1.0 second. [Neglect air resistance.]
The horizontal component of the ball's initial velocity is approximately what?
3.6 m/s
4.9 m/s
13 m/s
7.0 m/s
13. An arrow is shot at a 30.0° angle with the horizontal. It has a velocity of 49 m/s.
(a) How high will the arrow go?
(b) What horizontal distance will it travel?
14 A ball is thrown horizontally at a speed of 30 meters per second from the top of a cliff. If the ball hits
the ground 3.4 seconds later, how high is the cliff?
15. A golf ball is hit at an angle of 45° above the horizontal. What is the acceleration of the golf ball at
the highest point in its trajectory? [Neglect friction.]
9.8 m/s2 upward
9.8 m/s2 downward
6.9 m/s2 horizontal
0.0 m/s2
16. A stone is thrown horizontally at a speed of +5.8 m/s from the top of a cliff 94.9 m high.
(a) How long does it take the stone to reach the bottom of the cliff?
(b) How far from the base of the cliff does the stone strike the ground?
(c) What are the horizontal and vertical components of the velocity of the stone just before it hits the
ground?
17. A 6.0-newton force and an 8.0-newton force act concurrently on a point. As the angle between these
forces increases from 0° to 90°, the magnitude of their resultant
decreases
increases
remains the same