ame: ________________________
Exam 1--PHYS 201--F12
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____
____
1. What is the area of this paper in square centimeters?
a. 6 cm2
c. 600 cm2
2
b. 60 cm
d. 6000 cm2
2. 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 R if the equation is dimensionally correct?
x
t
=R
a
v
a.
____
1
m
s2
c.
s2
m
sm
b.
d.
3. Express the result of this mathematical operation with the appropriate significant figures:
35 + 3.24
+ 4.5
42
____
____
a. 5.4105
d. 5.4
b. 5.410
e. 5
c. 5.41
4. What are the three basic quantities in mechanics used by physicists to derive additional quantities?
a. force, area, and time
c. time, mass, and volume
b. mass, length, and time
d. area, mass, and charge
5. Since 1983 the standard meter has been defined in terms of which of the following?
a. wavelength of light emitted by
c. the distance light travels in 1/3x10 8
second
krypton-86
b.
specific alloy bar housed at Sevres,
France
d.
1
distance from the Earth's equator to the
north pole
m3
cm3
. What is the flow rate in
hr
s
____
6. Water flows at a rate of 45
____
cm3
s
3
cm
b. 3500
s
7. Which of these is not a vector quantity?
a.
13,000
cm3
s
c.
130
d.
4.5x107
cm3
s
I. Velocity
II. Speed
III. Displacement
IV. Mass
____
a. IV only
c. II & IV
b. I & III
d. III & IV
8. Consider this plot of position versus time and answer the following 2 questions:
What the direction of the velocity?
____
a. east
c. unable to tell
b. west
d. it is not moving
9. For the motion described by the previous plot, what is the direction of the acceleration?
a.
b.
east
west
c.
d.
2
unable to tell
it is not accelerating
____ 10. What is the mass of a typical man in kilograms?
a. 7 kg
c. 700 kg
b. 70kg
d. 7000 kg
____ 11. Which of these velocity versus time graphs represents the motion represented in this position versus time
graph?
b)
a)
a.
a
b.
c)
b
c.
3
d)
c
d.
d
____ 12. You throw a ball up into the air and it returns to your hand. Which of these plots best describes the motion of
the ball from the moment you release it to the moment you catch it?
a.
c.
b.
d.
____ 13. 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. v=0 and a=0
d. both v≠0 and a≠0
b. v=0, but a≠0
e. not enough information
c. v≠0, but a=0
4
____ 14. Consider this graph. At what time is the velocity greatest?
a. a
c. c
b. b
d. d
____ 15. Consider the previous graph. Where is the velocity negative?
a. a
c. c
b. b
d. d
5
Problem
16. (10 pts) Derive the equations of motion.
.
6
17. (15 pts)
a) Estimate the area of Nicholls’ campus. Express the area in square kilometers. Give the dimensions you
use to estimate this area.
b) Convert your area from part (a) to square meters.
c) There are 7000 students on campus. If they are all standing an equal distance from their closest neighbor,
how far apart will they be?
.
7
18. (5 pts) Consider this equation. What units must be placed in the blank place in order to make it
dimensionally correct?
x tv=
______________v t x
a
3
2
2
3
2
.
8
19. (25 pts) Consider this graph:
a) Graphically estimate the distance traveled between t=0 and 1 seconds.
b) Given the function for the velocity, calculate the distance traveled between t=0 and 1 seconds.
c) Graphically estimate the instantaneous acceleration at t=1.5s.
d) Given the function for the velocity, calculate the instantaneous acceleration at t=1.5s.
e) Calculate the average acceleration between t=0 and 3.5 seconds.
(Continue on next page if necessary.)
9
(Continued from previous page.)
a) Graphically estimate the distance traveled between t= 1 and 3.5 seconds.
b) Given the function for the velocity, calculate the distance traveled between t= 1 and 3.5 seconds.
c) Graphically estimate the instantaneous acceleration at t=1.5s.
d) Given the function for the velocity, calculate the instantaneous acceleration at t=1.5s.
e) Calculate the average acceleration between t=0 and 3.5 seconds.
.
10
20. (15 pts) You throw a ball straight up at an initial speed of 12.5 m/s.
a) What is the maximum height of the ball?
b) What is the ball’s velocity at t=2.0 seconds?
c) How much time elapses before the ball returns to your hand?
d) What is the speed of the ball when it returns to your hand?
.
11
ID: A
Exam 1--PHYS 201--F12
Answer Section
MULTIPLE CHOICE
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
C
A
D
B
C
A
C
A
B
B
D
B
B
C
D
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
PROBLEM
16. ANS:
.
PTS: 1
17. ANS:
.
PTS: 1
18. ANS:
.
PTS: 1
19. ANS:
.
PTS: 1
20. ANS:
.
PTS: 1
1