c V Andersen, 2006
1
Physics 1301, Exam 1 Review
The following is a list of things you should denitely know for the exam,
however, the list is not exhaustive. You are responsible for all the material
covered in the assigned readings, lectures, and homewor
Homework Discussion, Week 8
Physics 1301
Dr. Andersen
Chapter 11
61.) The total angular momentum must be conserved. The initial angular
momentum will have contributions from both the person and the merry-goround
1
Li = mvr + M r2 i
2
where m is the mass o
Homework Discussion, Week 8
Physics 1301
Dr. Andersen
Chapter 11
20.) The student is in static equilibrium. In this case all the forces act in
the y direction only. a) The force equation for y is:
122 N + 290 N mg = 0
Solving for m gives m = 42 kg . b) To
Homework Discussion, Week 7
Physics 1301
Dr. Andersen
Chapter 9
23.) Its a 1-D problem. Taking the direction of the moving cart to be
positive, momentum conservation reads
mv = 2mvf
(since the carts stick together.) So vf = v/2. The nal kinetic energy wil
Homework Discussion, Week 6
Physics 1301
Dr. Andersen
Chapter 7
41.) a) Solve P = W for W with P = 0.30 hp and t = 169 min. b) Convert
t
your answer from Joules to Calories.
Chapter 8
21.) a) Use conservation of energy
12
12
mvi + mgyi = mvf + mgyf .
2
2
Homework Discussion, Week 5
Physics 1301
Dr. Andersen
Chapter 6
51.) In this case, the normal force acts upward, the weight of the car downward, and the acceleration is a centripetal acceleration (which points downward), so F = ma can be written as
N mg =
Homework Discussion, Week 4
Physics 1301
Dr. Andersen
Chapter 5
42.) a) I set up my axes so that y is perpendicular to the surface of the incline
(so, in the same direction as the normal force), and x along the incline. Set up
this way, there are two forc
Homework Discussion, Week 3
Physics 1301
Dr. Andersen
Chapter 4
13.) a) The horizontal component of the velocity is not accelerated, so the
horizontal component of the velocity will be the same as when the crow
released the clam (i.e. 2.70 m/s). b) The in
Homework Discussion, Week 2
Physics 1301
Dr. Andersen
Chapter 2
78.) a) After they are released, both balls will experience equal acceleration
due to gravity. It might be tempting therefore to conclude that they both will
experience the same change in spe
Exam 4 Solutions
Multiple Choice Key
1. a
2. b
3. d
4. b
5. d
6. a
7. b
8. e
9. d
10. a
Worked Problems
1. Heat will ow until everything in the system is at the same temperature.
First check whether water can melt all ice before reaching 0 C . Heat
necess
Exam 3 Solutions
Multiple Choice Key
1. d
2. e
3. b
4. a
5. d
6. b
7. c
8. c
9. e
10. c
Worked Problems
1. Start with the general Doppler shift formula:
f =(
1 uo /v
)f
1 us /v
In this case, uo = 5.0 m/s, us = 25 m/s, and f = 210 Hz .
Hobo is moving awa
c V Andersen, 2006
1
Physics 1301, Exam 3 Review
The following is a list of things you should denitely know for the exam,
however, the list is not exhaustive. You are responsible for all the material
covered in the assigned readings, lectures, and homewor
Exam 1 Solutions
Multiple Choice Key
1. c
2. c
3. b
4. e
5. d
6. a
7. c
8. c
9. a
10. c
Worked Problems
1. Use conservation of energy:
12
2
mv + mgyi = mvf + mgyf
2i
Find dierence in heights using a bit o trigonometry:
yi yf = (1 m) sin 45 = 0.707 m
Sol
c V Andersen, 2006
1
Physics 1301, Exam 2 Review
The following is a list of things you should denitely know for the exam,
however, the list is not exhaustive. You are responsible for all the material
covered in the assigned readings, lectures, and homewor
Exam 1 Solutions
Multiple Choice Key
1. c
2. b
3. b (There was an error on the initial key. Exam scores have
been corrected to reect the correct answer.)
4. e
5. d
6. b
7. e
8. d
9. c
10. d
Worked Problems
1. To nd the total force:
Find the x and y compo
Homework Discussion, Week 11
Physics 1301
Dr. Andersen
Chapter 14
31) a) Use I = I0 10(/10) to solve for the intensity of 20. The intensity of
one will be I/20. Put that intensity in = 10 log(I/I0 ) to nd the intensity
in decibels. b) Since the decibel sc