Physics 10, UCLA, Winter 2012, Prof. Bob Cousins, TA
Solutions to Homework Set 6 (by Makan Mohageg et alia)
Note: R=Review, J=Projects, C=Plug & Chug, N=Ranking,
E=Exercise, P=Problem, *=Turned in
From Chapter 22 of Hewitt (Numbers in parentheses are thos
12 Rotational Motion
Rotating objects tend to
keep rotating while nonrotating objects tend to
remain non-rotating.
12 Rotational Motion
In the absence of an
external force, the
momentum of an object
remains unchanged
conservation of
momentum. In this
chap
9 Energy
Energy can change from one
form to another without a net
loss or gain.
9 Energy
Energy may be the
most familiar concept
in science, yet it is one
of the most difficult to
define. We observe the
effects of energy when
something is
happeningonly wh
18 Solids
Solids can be described in
terms of crystal structure,
density, and elasticity.
18 Solids
Humans have been
classifying and using
solid materials for many
thousands of years. Not
until recent times has
the discovery of atoms
and their interaction
20 Gases
Gas molecules are far apart
and can move freely between
collisions.
20 Gases
Gases are similar to
liquids in that they flow;
hence both are called
fluids. In a gas, the
molecules are far apart,
allowing them to move
freely between
collisions. A g
8 Momentum
Momentum is conserved for all
collisions as long as external
forces dont interfere.
8 Momentum
The concept of inertia was
introduced and developed both
in terms of objects at rest and
objects in motion. In this chapter
we are concerned only wit
15 Special RelativitySpace and Time
Motion through space is
related to motion in time.
15 Special RelativitySpace and Time
Motion through space is
related to motion in time.
The first person to
understand the relationship
between space and time was
Albert
16 RelativityMomentum, Mass, Energy, and Gravity
According to special relativity,
mass and energy are
equivalent. According to
general relativity, gravity
causes space to become
curved and time to undergo
changes.
16 RelativityMomentum, Mass, Energy, and
Formula Sheet
x
t
v
a
=
t
~
F = m~a
v =
(1)
(2)
(3)
p~ = m~v
(4)
~
p = F~ t
(5)
1
mv 2 + mgh
2
m1 m2
F =G 2
d
W = F d = KE
E=
efficiency =
total energy input
useful energy output
Power =
Energy
Time
(6)
(7)
(8)
(9)
(10)
Practice Midterm 2
Answer Key
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
c
a
c
c
b
a
a
c
a
a
b
a
b
b
c
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
a
d
a
c
a
a
c
c
d
a
b
b
b
a
a
Midterm 1 Materials
Chapter
2
3
4
5
6
7
9
Sections
3,4,5,6,7
1,2,3,4,5,6
1,2,3,4,5,6
1,2,3,4
1,2,3,4,5,6
1,2,3,4,5,6,7
1,2,3
Physics 10 - Practice Midterm 1
1) A freight train rolls along a track with considerable momentum. If it rolls at the same speed
b
Physics 10
Exam date: May 20, 2015
TA: David Perkins
Midterm 2 Study Guide
Please read this rst!
Dear students: Below I have compiled a list of relevant readings and problems from the text to prepare
you for the exam. Where possible, I identied odd questi
Physics 10
Exam date: June 8, 2015
TA: David Perkins
Final Exam Study Guide
Please read this rst!
Dear students: here is the study guide for the nal. It is formatted a little dierently than that of the
midterm, but it should be easy to follow. This time a
Practice Midterm 2: Physics 10
1. Two billiard balls of mass 0.5kg and an unknown mass m2 collide. The first ball was moving
to the right with a speed of 2m/s and the second (m2) to the left with a speed of 4m/s. After
the collision the ball with unknown
11 Rotational Equilibrium
An object will remain in
rotational equilibrium if its
center of mass is above the
area of support.
11 Rotational Equilibrium
What determines whether an
object will rotate when a
force acts on it?
Why doesnt the Leaning
Tower of
5 Projectile Motion
Projectile motion can be
described by the
horizontal and vertical
components of motion.
5 Projectile Motion
In the previous chapter we
studied simple straight-line
motionlinear motion.
Now we extend these ideas to
nonlinear motionmotio
Physics 10, UCLA, Fall 2014, Prof. Bob Cousins, TA Eliot Hijano
Solutions to Homework Set 7 (by Makan Mohageg et alia)
Note: R=Review, J=Projects, C=Plug & Chug, N=Ranking,
E=Exercise, P=Problem, *=Turned in
From Chapter 23 of Hewitt (Numbers in parenthes
Physics 10, UCLA, Fall 2014, Prof. Bob Cousins, TA Eliot Hijano
Solutions to Homework Set 9 (by Makan Mohageg et alia)
Note: R=Review, J=Projects, C=Plug & Chug, N=Ranking,
E=Exercise, P=Problem, *=Turned in
From Chapter 25 of Hewitt (Numbers in parenthes
Physics 10, UCLA, Fall 2014, Prof. Bob Cousins, TA Eliot Hijano
Solutions to Homework Set 5 (by Makan Mohageg et alia)
Note: R=Review, J=Projects, C=Plug & Chug, N=Ranking,
E=Exercise, P=Problem, *=Turned in
From Chapter 9 of Hewitt (Numbers in parenthese
Physics 10, UCLA, Fall 2014, Prof. Bob Cousins, TA Eliot Hijano
Solutions to Homework Set 8 (by Makan Mohageg et alia)
Note: R=Review, J=Projects, C=Plug & Chug, N=Ranking,
E=Exercise, P=Problem, *=Turned in
From Chapter 24 of Hewitt (Numbers in parenthes
Physics 133 Formulas
Remove these formula sheets from the exam packet and discard them after the exam.
r
v = f
= 2f =
v=
2
T
RT
M
= (10 dB) log
2
y(x, t) = A cos (kx t + )
v
, (n = 1, 2, 3, .)
2L
v
fn = n , (n = 1, 3, 5, .)
4L
d = m (m = 0, 1, 2, 3, .)
17 The Atomic Nature of Matter
Atoms are the building blocks
of most matter.
17 The Atomic Nature of Matter
Atoms are the building
blocks of most matter.
Everything you see,
hear, taste, feel, or smell
in the world around you
is made of atoms.
Shoes, ship
2 Mechanical Equilibrium
An object in mechanical
equilibrium is stable, without
changes in motion.
2 Mechanical Equilibrium
Things that are in balance with one
another illustrate equilibrium.
Things in mechanical equilibrium are
stable, without changes of
13 Universal Gravitation
Everything pulls on
everything else.
13 Universal Gravitation
Gravity was not
discovered by Isaac
Newton. What Newton
discovered, prompted
by a falling apple, was
that gravity is a
universal forcethat it
is not unique to Earth,
as
10 Circular Motion
Centripetal force keeps an
object in circular motion.
10 Circular Motion
Which moves faster on a
merry-go-round, a horse
near the outside rail or one
near the inside rail? While
a hamster rotates its cage
about an axis, does the
hamster
4 Linear Motion
You can describe the
motion of an object by its
position, speed, direction,
and acceleration.
4 Linear Motion
4.1 Motion Is Relative
An object is moving if its position
relative to a fixed point is changing.
4 Linear Motion
4.1 Motion Is R
Physics 10 Final Review
1.
a. What is the equivalent resistance of the resistors R2 and R3 that are connected in
parallel?
b. What is the total current in the circuit above?
c. What is the voltage drop across R1?
d. What is the power dissipated in R1?
2.