Chapter 9 Linear Momentum and Collisions
Answers to Even-numbered Conceptual Questions
2. 4. Doubling an object's speed increases its kinetic energy by a factor of four, and its momentum by a factor of two. No. For example, suppose object 2 has four
UIC PHYSICS 105 Spring 2013 Practice Final Exam
UIC Physics 105
Practice Final Exam
Spring 2013
Best if used by May 5
PROBLEM
Multiple
Choice
Short
Problem 1
Short
Problem 2
Short
Problem 3
Short
Problem 4
Short
Problem 5
Short
Problem 6
Total
POINTS
40
1
UICPHYSICS105Spring2013Midterm2PracticeExam
UIC Physics 105
Midterm 2 Practice Exam
Spring 2013
Best if used by March 31
PROBLEM
Multiple
Choice
Short
Problem 1
Short
Problem 2
Short
Problem 3
Short
Problem 4
Short
Problem 5
Short
Problem 6
Total
POINTS
4
v avg
x fin x ini
t fin t ini
v fin v ini
t fin t ini
aavg = ( 8 4)/(8 0) = 1.5 m/s2
v(m/s)
0
048 t(s)
4
8
4
2
0
048 t(s)
2
4
16
vavg = (0 4)/(8 0) = 0.5 m/s
(d) Determine the objects average
acceleration between t = 0 and t = 8 s.
aavg
4
a(m/s2)
Exampl
Ch. 3
PHYS 105: Vectors and Motion in Two Dimensions
Using Vectors: Vector Components
Scalars and Vectors in Physics
Scalars
distance
speed
mass
temperature
etc.
Physical Quantities
Vectors
Multiplication of a vector by a displacement
velocity
scalar cha
Ch. 3
PHYS 105: Vectors and Motion in Two Dimensions
Relative Motion
GalileanPrincipleofRelativity
referenceframe:
O
V
65mi/h
referenceframe:
85mi/h
v and v'
v' v V
The motion in the y-direction
is independent of the motion in
the x-direction
Galileo Ga
UIC: PHYS105
Get your iClickers ready
1
UIC: PHYS105
Introduction to Physics
Which one of the following equations is dimensionally correct?
1
2
2
(A) x v t
The SI units for the quantities are:
x: m
v: m/s
a: m/s2
x2
(B) v
t
(C) v 2 a x
(D) x a t
2
2
L
Ch. 1
PHYS 105: Introduction to Physics
Trigonometry. Estimation
Trigonometry
Example: An observer, whose eyes are 1.8 m above the ground, is standing 50
m away from a tree. The ground is level, and the tree is growing perpendicular
to it. The observer's
Ch. 4
PHYS 105: Forces and Newtons Laws of Motion
Newtons 3rd Law
Newtons 3rd Law: If object A exerts a force on object B, then object B exerts a
force of A of equal magnitude in opposite direction
Forces always appear in pairs FAB = FBA
The sing means t
Ch. 3
PHYS 105: Vectors and Motion in Two Dimensions
Projectile Motion
Range of a Projectile
2
v0
sin( 2 0 )
x
g
x max
2
v0
g
the maximum horizontal distance
traveled by the projectile
Example: A pirate ship is 560 m from a fort defending a harbor entran
PHYS 105: Applying Newtons Laws
Tension. Ropes and Pulleys
Ch. 5
Tension
When you pull on a string or rope, it becomes taut. We say that there is
tension in the string.
Mass suspended
by a string
mstring Tt
Tb
The tension in a real string will
vary along
PHYS 105:
Introduction to Physics Course
Serguei V. Kouznetsov, Ph.D.
(PHYS 105 instructor/coordinator, office: 3136 SES)
[email protected]
Office Hours:
Monday, Tuesday, and Thursday 10:00 AM 11:30 AM
Physics 105 web site: https:/blackboard.uic.edu/
Georg
9
Momentum
Linear Momentum, Momentum-Impulse Theorem
m
?
initially at rest
M
If M = 10 m and v0 = 5 m/s then we will measure v 0.5 m/s
It is tempting to conclude that the total amount of motion is the same before and after
the boy jumps onto the cart, sin
10
Energy and Work
Potential Energy. Gravitational Force
y
y
Workdonebyaconservativeforceissomehow
Wgravity mg ( y y0 )
B stored
mgh
Wgravity (mgy mgy0 ) (U U 0 ) U
g
h
y0
A
U mgy
PotentialEnergy
Atgroundlevel: U0
mgy0 0
PotentialEnergy:
U mgh
Sinceth
PHYS 105
2nd Midterm Exam
Date: Tuesday, July 21
Time: 8:00 AM 9:40 AM
Location:
SES 130
Structure of exam:
15 independent multiple choice questions
(3-4 questions per each chapter)
4 "Short/Long Problems" (2-3 questions per
problem)
MT2 exam will cover:
Physics 105
Quiz Week 14
April 21, 2016
Last Name (print clearly): 90 (W lLO 48
First Name (print clearly):
UIC Email (print clearly):
This quiz must be done on your own with no help from anyone else. In order to receive credit,
please print your informat
Rotational Motion
Torque
Q1: Tom and Jerry both push on the 2.25 m radius merry-goround as shown in the figure on the right. Both push with the
same magnitude of force of 150 N. What is the net torque on
the merry-go round?
Torque, moment of inertia, and
Solution
Physics 105
Quiz Week 4
Feb. 2, 2016
Last Name (print clearly): _
First Name (print clearly): _
NetID (UIC Email Name): _
This quiz must be done on your own with no help from anyone else. In order to
receive credit, please print your information
Circular Motion, Orbits, and Gravity
Circular Motion
Q1: The cylindrical Space station in the gure ShOWn to the right is
200 m in diameter and rotates in order to provide articial gravity of
g for the occupants
A. What radial acceleration (in units
Phys 105: Practice Problems Set 1
Q1: The graph to the right shows the position-time curve for a jogger. 2
(a) What is the instantaneous velocity att= 2 s? E 0
SIOFL a W was Aw. 3;
. 9.
v: um VA ,_ 19140.3 M15] .2
5 I 5 L1 5
.4
(b) What is the average
Physics 105
Quiz Week 5
Feb. 9, 2016
Wows
Last Name (print clearly):
First Name (print clearly):
NetID (UIC Email Name):
This quiz must be done on your own with no help from anyone else. In order to
receive credit, please print your information *CLEARLY*
Physics 105
Quiz Week 10
Mar. 15, 2016
Solution
Student Number: E_
Last Name (print clearly): _
First Name (print clearly): _
UIC Email (print clearly): _
This quiz must be done on your own with no help from anyone else. In order to receive credit, you
m
Physics 105
Quiz Week 3
Jan. 26, 2016
Last Name (print clearly): _ 30 (M *7 O 45
First Name (print clearly):
NetID (UIC Email Name):
This quiz must be done on your own with no help from anyone else. In order to
receive credit, please print your informatio
Physics 105
First Midterm Exam
February 11, 2016
Solutions
Last Name (print clearly):
First Name (print clearly):
UIC Email (print clearly):
Signature:
Giving or receiving aid in any examination is a cause for dismissal from the
University. Any other viol
Physics 105
Practice Second Midterm Exam
Spring 2016
Last Name n r1nt
First Name irint
Net ID
Giving or receiving aid in any examination is a cause for dismissal from the
University. Any other violation of academic honesty can have the sam
Practice Problems Set 2
Q1: Vector A is 100 units long and vector B is 80 units long. Their
directions are shown in the gure on the right. IB |= so '/
(a) What are the x- and y-components of vector A?
Ax c +l00 c0530 : +854? \i\v~\"$
An = +00 Sim'boo : 3(
Practice Problems Set 3
01: A 4 kg object, moving in the negative x-direction at
speed 10 m/s encounters a force shown in the graph to the
right. What is the instantaneous velocity of the object at t =
10 s?
a: j; ., eld = +9;
\M tug 5
V1. 7. "0 Ns
. 0
Physics 105
Quiz 3
Sep.21,2017
WWW
Last Name (print clearly):
First Name (print clearly):
NetlD (UIC Email Name):
This quiz must be done on your own with no help from anyone else. In order to
receive credit, please print your information *CLEARLY* above a
Practice Problems Set 3
Q1: A 4 kg object, moving in the negative x-direction at
speed 10 m/s encounters a force shown in the graph to the
right. What is the instantaneous velocity of the object at t =
1.0 5?
[0
Force (N)
? FW :1 on) 3 SM 5 l0
Time (s)
Physics 105
Quiz 1
Sep 7, 2017
WDW)
Last Name (print clearly):
First Name (print clearly):
NetlD (UIC Email Name):
This quiz must be done on your own with no help from anyone else. In order to
receive credit, please print your information *CLEARLY* above
Physics 105 Practice Problems for Midterm 1
UIC Fall 2017
SOLUTION
1
1
Graph of an Objects Velocity
The velocity of an object moving along the x-axis is shown to the right from t = 0 s until t = 16 s.
a) What is the x-acceleration of the object at
t = 3 s