Physics 102
In Class Problems
Problem 1. The cart of whiteboards has a mass of 30 kg. Michael and Dan are trying to push it
across the lecture hall. Michael pushes in the East direction with a force of 150 N. Dan pushes in
the NE direction with a force of
Physics 102
Problem Set 1, Vectors
Problem 1. Consider the four vectors in the gure to the right. Graphically determine the
following vectors, R = A + B + C + D , S = 2A B 3C + D and T = D 3C + 2A B .
S
R
D
D
A
B
-B
2A
-3C
-3C
C
2A
-B
D
T
Problem 2. Let A
Physics 181
Laboratory Manual
Course Coordinator: Dr Haar
This Laboratory Manual
was produced for the
PHYSICS DEPARTMENT
UNIVERSITY OF ARIZONA
By
Brian LeRoy
2013
Based in part on previous
Physics Department
Laboratory Manuals
Copyright 2013
All rights re
Physics 102
Problem Set 2, One Dimensional Kinematics
Problem 1. If the average velocity of an object is zero in some time interval, what can you say
about its displacement in that interval? What about its distance travelled? Explain your answers.
You kno
Physics 102
Problem Set 5, Work and Energy
Problem 1. As a simple pendulum swings back and forth, the forces acting on it are gravity, the
tension in the supporting cord and air resistance. (a) Which of these forces, if any, does no work on
the pendulum?
Physics 102
Problem Set 4, Newtons Laws
Problem 1. A passenger sitting in the rear of a bus claims that he was injured when the driver
slammed on the brakes, causing a suitcase to come ying toward him from the front of the bus. If
you were the judge in th
Physics 102
Problem Set 1, Vectors
Problem 1. Consider the four vectors in the gure to the right.
Graphically determine the following vectors, R = A + B + C + D ,
S = 2A B 3C + D and T = D 3C + 2A B .
Problem 2. Let A = 3 cm and B = 4 cm where the cm stan
Physics 102
Problem Set 3, Two Dimensional Kinematics
Problem 1. If you know the position vectors of a particle at two points along its path and also
know the time interval during which it moved from one point to the other, can you determine the
particles
Physics 102
In Class Problems
*Problem 1. Let A = (5 + 2) cm, B = ( + 2) cm and C = A 2B .
x
y
x
y
(a) Graph the vectors A, B , and C .
B
A
A-2B
(b) Find the magnitude of C .
13 cm
First we can write the expression for C .
C = (5 + 2) cm 2 ( + 2) cm
x
y
x
Physics 102
In Class Problems
Problem 1. A person is standing on the mall directly above the ILC. They throw a ball so that it
hits the ground below after t = 1 s. The ground is h = 8 m below the person.
(a) Do they throw the ball upwards or downwards? Do
Practice Exam 1
Firstname
PHYSICS 102
September 27, 2013
Lastname
You must start all problems from the equations on the sheet.
You must show all work to get full credit for the problem.
Please box your answers.
If you need more space, you may use the back
Physics 102
Problem Set 3, Two Dimensional Kinematics
Problem 1. If you know the position vectors of a particle at two points along its path and also
know the time interval during which it moved from one point to the other, can you determine the
particles
Physics 102 Equations
a2 + b2 = c2
cos =
opposite
hypotenuse
ax + bx + c = 0
2
If
v=
sin =
x
t
a=
adjacent
hypotenuse
then
x
t0 t
v
t
v = lim
v = v0 + at r = r0 + v0 t + 1 at2
2
tan = sin / cos
x=
b b2 4ac
2a
v
t0 t
a = lim
|g | = 9.8m/s2
Fext = ma w = m
Physics 102 Numerical Answers
Problem Set 1, Vectors
Problem 2. (b) 5 cm.
Problem 3. (a) 13 cm, = 33.7, (b) 1, -5.
Problem 6. (a) (2 6) cm, (b) (4 + 2) cm, (c) 2 10 cm, (d) 2 5 cm, (e) -71.56, 26.57.
x
y
x
y
Problem 7. (a) 3.5 km, (b) 2.11 km, 9.55 .
Prob