Chapter 1 and 2 Review
1. How many minutes would it take light, traveling at a speed of 3.00x108m/s, to reach us from the Sun?
The Sun is 150 million km from the Earth.
Answer: 8.3 minutes
Diff: 2
1. A car travels at 40 km/h for 30 min and 60 km/h for 15 min. How far does it travel in this time?
A) 45km
B) 37.5km
C) 20km
D) 35km
E) 28.4km
Answer: D
Diff: 2
16) A person ran a marathon (42.0 km) in 2hrs:57min. Their average speed, in m/s, was
A) 14.2 m/s.
B) 3.95 m/s.
C) 14.2 x 103 m/ s.
D) 124m/s.
E) 2.31 m/s.
Answer: B
Dilf: 2
Sig Fig
1) Which of the following numbers has 4 significant figures? Which has 5 significant figures?
(a) 003000.
(b) 030.0
(c) 4774.00
(d) 29.290
Answer: a; d
Diff:3
4) Consider a human heart rate of 80 beats per minute. If someone's heart beats at that rate over a 70-yr
lifetime, how many times would it beat?
A) 2.20 x 109
B) 7.44 x 105
C) 3.26 x 1010
D) 2.95 x 109
E) 1.78 x 107
Answer: D
Diff: 2
5) In adding the numbers 420.77, 13.821, and 2317.8
(a) the result should be rounded to how many significant figures?
(b) what is the sum?
Answer: (a) 5 sig-figs
(b) 2752.4
Diff: 3
7) What is the result of adding 23.4 to 91.237 and then subtracting 23.4?
A) 91.237
B) 91.2
C) 91.3
D) 91.0
E) 91.
Answer: B
Diff: 2
8) Which of the following has the greatest number of significant figures?
A) 03.1400
B) 314.1
C) 3.142
D) 000.3140
E) 0.003142
Answer: A
Diff: 1
11) Which of the following has three significant figures?
A) 1.00081kg
B) 8.060 x 1011m
C) 0.0500 mm
D) 305.0 cm
Answer: C
Diff: 2
12) Determine the number of significant figures in 24.0 seconds.
Answer: 3
Diff: 1
13) Express the result of the following calculation, to the proper number of significant figures:
(0.02739)x(-240,000)
Answer: -6,600.
Diff: 2
14) Express 0.2300 x 102 meters to three significant figures.
Answer: 23.0 meters
Diff: 1
15) Determine the number of significant figures in 100.01 x 103 meters.
Answer: 5
Diff: 2
16) Express the result of the following calculation, to the proper number of significant figures:
50.19 - 7966 x 10-3
Answer: 42.22
Diff: 2
18) Determine the number of significant figures in 0.055 cm.
Answer: 2
Diff: 1
19) The number of significant figures in 0.40 is
A) one.
B) two.
C) three.
D) four.
E) five.
Answer: B
Diff: 2
20) Add the following lengths, each obtained from a different measuring instrument, and round off the answer
to the proper number of significant figures: 20.02m, 5.91m, 0.0097m, and 2.467m.
Answer: 28.41
Diff: 2
24) Express 0.0015671 kg to three significant figures.
Answer: D.00157 kg
Diff: 2
25) Express the result of the following calculation, to the proper number of significant figures:
8.4 + 4240.
Answer: 4248.
Diff: 2
30.0
Position vs. Time
25.0
meters
20.0
15.0
Student 1
Student 2
Student 3
10.0
5.0
0.0
0.0
10.0
20.0
30.0
seconds
1. What is the speed of student 1?
a. 0.4m/s
b. 0.5m/s
c. 2.4m/s
d. 5.0m/s
e. Can’t determine from the graph.
A. 0.4m/s (slope of the line)
2. Which student is moving fastest?
a. Student 1
b. Student 2
c. Student 3
d. Can’t determine from the graph.
a.
Student 1 (slope is greatest.)
40.0
50.0
60.0
3. At what time are student 1 and student 2 at the same position?
a. 0s
b. 10s
c. 31s
d. 48s
e. They are never at the same position.
f. Can’t be determined from the graph.
e. They are never at the same position.
4. At what time are student 2 and student 3 at the same position?
a. 0s
b. 10s
c. 31s
d. 48s
e. They are never at the same position.
f. Can’t be determined from the graph.
C. 31 seconds
5. What distance does student 3 move from 10 to 20 seconds?
a. 0m
b. 2m
c. 6m
d. 8m
e. Can’t determine from the graph.
B. 8m - 6m = 2m
6. At what time does student 1 pass student 2?
a. 0s
b. 48s
c. 31s
d. Student 1 is always behind student 2.
e. Student 1 is always ahead of student 2
E. Student 1 is always ahead of Student 2.
35.0
Position vs. Time
30.0
25.0
meters
20.0
Student 1
Student 2
15.0
Student 3
Student 4
10.0
5.0
0.0
0.0
10.0
20.0
30.0
40.0
50.0
60.0
seconds
1.
Which student was moving the fastest?
a. Student 1
b. Student 2
c. Student 3
d. Student 4
Answer: A. Slope is greatest.
2. Which student was moving toward the origin?
a. Student 1
b. Student 2
c. Student 3
d. Student 4
Answer: D: student 4’s position is decreasing, so it is getting closer to the origin. The rest are moving away
from the origin.
3. Which student has a negative velocity?
a. Student 1
b. Student 2
c. Student 3
d. Student 4
Answer: D Student 4 has a negative slope, so it has a negative velocity.
4. Which student was moving faster?
a. Student 3
b. Student 4
c. They were going the same speed, but different velocities.
Answer: C – slopes are the same value, so the speeds are the same.
2) Speed is to velocity as distance is to _
A) magnitude
B) acceleration
C) displacement
D) direction
E) temperature
Answer: C
Diff:2
3) Refer to the figure.
At t = 0
A)
B)
C)
D)
s
rider D is ahead of rider C.
rider C is ahead of rider D.
riders C and D are at the same position.
rider 0 is moving faster than rider C.
Answer: A
Diff: 2
3) A train takes 3.0 hours to travel the 1st leg of a trip at 20. m/s. How fast must it move over the 2nd
leg of 200. km to have a total average speed of 30. m/s?
Answer: 65. m/s
Diff:2
5) Give examples of four quantities which are scalars.
Answer: distance, temperature, speed, age
Diff:2
4) Refer to the figure:
At t = 10 s
A) C and D are at the same position.
B) C and D have the same velocity.
C) the velocity of D is greater than the velocity of C.
D) C is in front of D.
E) the acceleration of D is greater than the acceleration of C.
Answer: A
Diff: 2
6) Give examples of four quantities which are vectors.
Answer: displacement, velocity, acceleration, force
Diff: 2
1 ) Denis swims the length of a 40. meter pool in 10. seconds and immediately swims back to the
starting position in another 15. seconds. What was his average speed?
Answer: Avg speed 3.2 m/ s.
Diff: 2
3) A motorist travels for 3.0 h at 80 km/h and 4.0 h at 60 km/h. What is her average speed for the
trip?
A) 74 km/h
B) 140 km/h
C) 70 km/h
D) 73 km/h
E) 69 km/h
Answer: E
Diff: 2
26) A motorist travels 160km atc80 km/h and 160km at 100 km/h. What is the average speed of the
motorist for this trip?
A) 90 km/h
B) 89 km/h
C) 60 km/h
D) 91 km/h
E) 84 km/h
Answer: B
Diff: 2
8) Refer to the figure:
At t=1 s
A) C is moving, and D is at rest.
B) D is moving, and C is at rest.
C) C and D are both moving.
D) C and D are both at rest.
E) C is ahead of D
Answer: C
Diff:2
9) Refer to the Figure:
At t; 1 s
A) C has a greater velocity than D.
B) D has a greater velocity than C.
C) C and D have the same velocity.
D) C is accelerating.
E) D is accelerating.
Answer: A
Diff: 2
Using the particle method for a motion diagram, where should you choose to position your dot for a
kangaroo jumping along Austin Boulevard?
Answer: the middle of the body or center of mass (where the kangaroo balances). If you use head or
tail, you might get an incorrect diagram.
Which graph represents the an object moving backward compared to the origin?
36) Which graph represents an object at rest?
A) graph a
B) graph b
C) graph c
D) graph d
E) both graphs a and d
Answer: A
Diff: 2
--------------------------------------------------------------------------------------Draw a proper position vs. time line graph from the following data and find the speed.
Time(min) Position(km)
0
-5
10
46
13
61.3
22
107.2
35
173.5
42
209.2
52
260.2
54
270.4
63
316.3
73
367.3
83
418.3
99
499.9
103
520.3
124
627.4
136
688.6
137
693.7
145
734.5
152
770.2
Extra practice
9) How many significant figures are in 0.0037010?
A) 4
B) 5
C) 6
D) 7
E) 8
Answer: B
Diff:l
10) What is the area of a circle of radius 1.119 m?
A) 3.934m2
B) 3.93m2
C) 3.9338m2
D) 3.93378m2
E) 3.937 m2
Answer: E
Diff: 2
3) Four students measure the mass of an object, each using a different scale. They record their results as
follows:
student
Student
Mass (g)
A
49.06
B
48
C
50
Which student used the least precise scale?
A) A
B) B
C) C
D) D
Answer: B
Diff:2
6) Express the following number to three significant figures: 21.25 m
Answer: 21.3 m
Diff: 2
D
49.2