NAME:
PHY 2048
Fall 2016
Exam 1A
You must show complete work to get credit for your answer.
Give answers to 3 or 4 signicant gures, and
express all vectors in standard z'A ,jA'JQ or ( , , ) notation.
Be sure to indicate your answer(s) clearly.
Use g = 9.8
LAB 02-Measurement of Electrical Resistance and Ohms Law
James
February 3, 2015
PHY2049L-Tuesdays at 5:30 pm
Lab Station E
Partner: Chris
Abstract
Yes,eachofthematerialsthatwetesteddidobeyOhm'sLawexceptforthelightbulb.Eachof
thecopperresistorwetestedhadan
LAB 02-Measurement of Electrical Resistance and Ohms Law
James
February 10, 2015
PHY2049L-Tuesdays at 5:30 pm
Lab Station E
Partner: Chris
Abstract
Ohmslawsarethelawsthatdescribethevoltageandcurrentsofacircuitconnectedinseries
andparallel.Yes,wefoundthato
LAB 01-Equipotentials and Electric Fields
James
January 21, 2015
PHY2049L-Tuesdays at 5:30 pm
Lab Station E
Partner: Chris
Abstract
Yes,ourmeasuredvaluesfortheelectricfieldagreewiththemodelpredictionforaparallelplate
capacitor.Ourexperimentyieldedapercent
LAB 02-Measurement of Electrical Resistance and Ohms Law
James
February 3, 2015
PHY2049L-Tuesdays at 5:30 pm
Lab Station E
Partner: Chris
Abstract
Yes,eachofthematerialsthatwetesteddidobeyOhm'sLawexceptforthelightbulb.Eachof
thecopperresistorwetestedhadan
LAB 01-Equipotentials and Electric Fields
James Griffith
January 21, 2015
PHY2049L-Tuesdays at 5:30 pm
Lab Station E
Partner: Chris J. Colson
Abstract
Yes,ourmeasuredvaluesfortheelectricfieldagreewiththemodelpredictionforaparallelplate
capacitor.Ourexperi
LAB 02-Measurement of Electrical Resistance and Ohms Law
James
February 10, 2015
PHY2049L-Tuesdays at 5:30 pm
Lab Station E
Partner: Chris
Abstract
Ohmslawsarethelawsthatdescribethevoltageandcurrentsofacircuitconnectedinseries
andparallel.Yes,wefoundthato
LAB 01 Uniformly Accelerated Motion
James
9/9/14
PHY2048L Tuesday at 5:30 pm
Lab Station D
Partner: Diana
The answer to the question, what is gravity in our lab, was found during our
experiment. We found that gravity for a mass of (0.542 0.005)kg in our
u
LAB 06 Torques & Rotational Equilibrium
James
10/21/14
PHY2048L Tuesday at 5:30 pm
Lab Station D
Partner: None
Abstract
Yes, my data is consistent with the torque counterclockwise equals torque
clockwise creating equilibrium. All of our data in this exper
LAB 03 Newton's Second Law On An Air Track
James
9/23/14
PHY2048L Tuesday at 5:30 pm
Lab Station D
Partner: Diana
Abstract
Yes, our data was consistent with Newton's Second Law, but poorly. In our lab we calculated
that our known M Total = (0.3700.005)kg
LAB 05 Ballistic Pendulum and Projectile Motion
James
10/7/14
PHY2048L Tuesday at 5:30 pm
Lab Station D
Partner: None
Abstract
The speed of the ball fired by the spring-powered launcher was calculated to be
(6.429 0.03701)m/s for the pendulum and (6.429 .
LAB 07 Moment of Inertia and Rotational Motion
James
10/28/14
PHY2048L Tuesday at 5:30 pm
Lab Station H
Partner: Liam
Abstract
Yes, our data does confirm Newtons 2ed Law for rotation. In this experiment we
calculated an r value of 1.00 in the first run an
LAB 09 Standing Waves On A String
James
11/17/14
PHY2048L Tuesday at 5:30 pm
Lab Station H
Partner: Liam
Abstract
Yes, the data that we collected was constant with what we expected between the
tension and the frequency of a n=3 standing wave. We know this
LAB 08 Simple Harmonic Motion
James
11/04/14
PHY2048L Tuesday at 5:30 pm
Lab Station H
Partner: Liam
Abstract
The fraction of the spring mass that must be added to the hanging mass M, which
is 0.279 kg or about 1/5 of a kg, was calculated in post lab ques
PHY 2048
Midterm Exam
Spring 2011
2
Use g = 9.80 m/s .
1. [20 points]
A 56 kg astronaut drifting with a velocity of (+ 1.86 $ ) m/s is holding
j
a 9.86 kg module for the space station. She throws the module to another
astronaut at a velocity of ( 2.59 i$
PHY 2048
Midterm Exam - DAY
Fall 2010
2
Use g = 9.80 m/s and G = 6.67 10-11 Nm2/kg2 .
1. [15 points]
A 7.65 kg mass moves with a velocity given by the function
v(t) = (5t3 7t2 11) m/s. What is the force acting on this mass?
Give your answer as a function
PHY 2048
Midterm Exam
Spring 2010
2
Use g = 9.80 m/s and G = 6.67 10-11 Nm2/kg2 .
1. [15 points]
A wagon of mass 7.21 kg has an initial velocity of + 2.87 i$ m/s. If the wagon
comes to rest after moving 5.88 i$ m, what force acted on it? Assume the force
PHY 2048
Midterm Exam - DAY
Fall 2009
2
Use g = 9.80 m/s and G = 6.67 10-11 Nm2/kg2 .
1. [15 points]
A mass M (837 kg) is at the origin and a
mass m (372 kg) is located at the point
x = 0.055 m, y = 0.037 m as shown.
(A) Find the magnitude of the gravitat
PHY 2048
Use g = 9.80 m/s
Midterm Exam
G = kg
Spring 2009
m
1. [10 points] The angular position of a 3.7 kg disk is given by = ( 6t3 8t2 + 5 ) rad, where t is in s. What is its angular velocity at t = 2.14 s?
2. [10 points] A 3.75 kg mass is hung on a spr
PHY 2048
Midterm Exam - DAY
Use g = 9.80 m/s .
Fall 2008
1. [20 points] A 7.83 kg mass slows down from 48.7 m/s to 29.8 m/s while sliding 32.3 m. Find its acceleration and the time it took for this to happen. Give your well-organized calculation below. In
PHY 2048
Exam
SAMPLE
Sometime
You must show complete work to get credit for a problem solution.
Be sure to indicate your assumptions and answer(s) clearly.
Give all results to 3 or 4 significant figures.
Specify all vectors in i, j, k component notation
g = 9.80 m/s
2
G = 6.67 10 11 Nm2 / kg 2
( 9.81 m/s 2 )
MEarth = 5.97 1024 kg
REarth = 6.37 106 m
Moments of inertia (about the CM unless noted otherwise)
hoop or cylindrical shell: MR
2
2
1
disk or solid cylinder: 2 MR
1
2
2
hollow cylinder: 2 M ( R1 + R
PHY 2048
Midterm Answers - DAY
Fall 2010
1. ( 115 t2 107 t ) N
2. T = F / sin(2) [free-body diagram like Wolfson problem 5-35]
[ energy - collision - energy or constant a ]
3. 2.291 m
4. 5.778 s
5. False. It can if F is perpendicular to v, as in circular
PHY 2048
Midterm Answers
Spring 2010
Note: These are answers, not complete solutions.
1. 5.050 i$ N
2. 67.70 J
3. (A)
(B) 40.06 m/s
4. False: Velocity can change direction while speed is constant.
5. (4.918 i$ 1.245 $ ) m/s
j
6. 195.9 nN
7. (A) ( 17.71 i$
PHY 2048
Midterm Answers - DAY
Fall 2009
(B) ( 3.922 i$ 2.638 $ ) mN
j
1. (A) 4.726 mN
2. 6.364 W
3. 4.424 kg
4.
[ plus free-body diagrams like fig 4.12 and fig 5.2 with Tension ]
E
5. 0.5892 m
[solution should use Ef = Ei + W, where W = +10.5 J]
6. ( 6.3