Name: ________________________ Class: ___________________ Date: __________
Exam 1--PHYS 101--F15
Multiple Choice
Identify the choice that best completes the statement or answers the question.
1. Which of these best approximates the volume of a
person’s head?
a. 8 cm3
b. 80 cm3
c. 800 cm3
d. 8000 cm3
4. Which of these equations is dimensionally correct?
I.
II.
III.
2. A guy in a kayak can travel approximately what
distance in 10 minutes?
a. 6 m
b. 600 m
c. 6000 m
d. 60,000 m
a.
b.
c.
d.
e.
3. Consider this equation. The units for the variables
are as follows: (t: s; v: m/s; a: m/s 2; x: m) What
must be the units for B if the equation is
dimensionally correct?
b.
c.
d.
II
I & III
III
II & III
all of these are correct
5. Consider this expression. How many significant
figures should the final answer have?
4.1 * 3.45 + 0.2
a
x
=B v
t
a
a.
v2 = v20 + 2ax
1 mv2 + xma = mx2 1
2
t
v= x
t
a.
b.
c.
d.
1
2
3
4
6. Since 1967 the standard definition for the second
has been based on which of the following?
a. Greenwich Civil Time
b. sidereal day
c. average solar day
d. characteristic frequency of the cesium-133
atom
s2
1
s4
at
s4
m
1
10. A European sports car dealer claims that his
product will accelerate at a constant rate from rest
to a speed of 100. km/hr in 8.00 s. What is the
speed after the first 5.00 s of acceleration? ( Hint:
First convert the speed to m/s.)
7. Consider the following right triangle. What is the
angle, θ?
a.
15°
b.
70°
c.
20°
d.
30°
a.
b.
c.
d.
8. Consider the triangle in the previous question.
What is the length of the hypotenuse?
a.
b.
c.
d.
21 m
12 m
9.0 m
82 m
17.3 m/s
28.7 m/s
34.7 m/s
44.4 m/s
11. A ball is pushed with an initial velocity of 4.0 m/s.
The ball rolls down a hill with a constant
acceleration of 1.6 m/s 2. The ball reaches the
bottom of the hill in 8.0 s. What is the ball's
velocity at the bottom of the hill?
9. Acceleration is the rate of change of velocity. A
car accelerates at a rate of 12 m/s 2. What is this in
miles/hour2. (1 mile = 1609 m)
a. 27 mi/hr2
b. 97,0000 mi/hr2
c. 0.0015 mi/hr2
d. 0.0075 mi/hr2
e. 19,000 mi/hr2
a.
b.
c.
d.
2
17 m/s
12 m/s
16 m/s
10 m/s
12. You throw a ball up with an initial speed of 30 m/s.
How long does it take for the ball to return to your
hand?
a.
b.
c.
d.
e.
15. When throwing a ball straight up, which of the
following is true about its velocity and acceleration
at the highest point in its path?
a. both v≠0 and a≠0
b. v=0, but a≠0
c. v≠0, but a=0
d. v=0 and a=0
e. not enough information
16. If the velocity of a car is non-zero (v≠0), can the
acceleration of the car be zero?
2s
3s
4s
6s
9s
a.
b.
c.
13. You throw a ball up with an initial speed of 30.
m/s. What is its maximum height?
a.
b.
c.
d.
e.
17. A car begins at a velocity of 30 m/s and ends at a
velocity of 20 m/s. Which of these position versus
time graphs represent this motion?
15 m
45 m
180 m
150 m
140 m
a.
b.
c.
d.
14. You drive for 30 minutes at 30 mi/hr and then for
another 30 minutes at 50 mi/hr. What is your
average speed for the whole trip?
a.
b.
c.
d.
Absolutely yes!
Surely not!
it depends on the velocity
a
b
c
d
18.
Which of these statements represent the motion
represented in this plot?
more than 40 mi/hr
equal to 40 mi/hr
less than 40 mi/hr
not enough information
a.
b.
c.
d.
3
decreasing speed, negative velocity
increasing speed, negative velocity
increasing speed, positive velocity
decreasing speed, positive velocity
19. Consider the following graph. What is the velocity at t=8.5s?
a.
b.
3 m/s
16 m/s
c.
d.
0.06 m/s
-0.67 m/s
20. Consider the graph in the preceding question. What
is the average velocity between points E & H (t=6
and 11 seconds, respectively)?
a.
b.
c.
d.
21. Consider this position versus time graph. Which of
the following best represents the velocity versus
time graph for the object described in the position
versus time graph?
6 m/s
0.4 m/s
2 m/s
-3 m/s
a.
b.
c.
d.
4
a
b
c
d
22. Consider this graph of velocity versus time. What distance has this particle traveled between t=0 and t=4
seconds?
a.
b.
25 m
210 m
c.
d.
0m
13 m
23. Consider the graph of velocity versus time in the
previous question. What is the acceleration at
t=3.5 s?
a.
b.
c.
d.
e.
25. Consider these 2 vectors. What is the magnitude of
their sum, ä
A +ä
B?
ä
A = 11 units along the +y axis
ä
B = 24 units at 20.0 degrees above the +x axis
0 m/s2
-6 m/s2
-18 m/s2
5 m/s2
-12 m/s2
a.
b.
c.
d.
24. A vector has a magnitude of 12 m and is 20.0
degrees above the x-axis. What is the x-component
of the vector?
a.
b.
c.
d.
20 m
11 m
4.4 m
4.1 m
5
16 units
30. units
25 units
42 units
26. Consider these vectors. What is A-B?
a.
b.
a
b
c.
d.
c
d
27. A vector has a negative x-component and a positive
y-component. The magnitude of the y-component
is bigger than the x-component. Which of these is
the only appropriate angle, measured from the +x
axis, for this vector?
a.
b.
c.
d.
e.
100°
170°
80°
190°
225°
28. Who is Dr. Young’s favorite student???
a. the guy next to me
b. the lady on the front row
c. Bill Thornton
d. me!
6
ID: A
Exam 1--PHYS 101--F15
Answer Section
MULTIPLE CHOICE
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F15-WWP
F15
F15-WWP
F15
F15-WWP
F15-WWP
F15
F15
F15
2
F15
F15
F15
F15-WWP
F15-WWP
F15
F15-WWP
F15
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F15
F15
F15
F15
F15-WWP
F15--WWP
F15-WWP
F15-WWP
1
REF: F15-WWP