Physics 131 Homework Solutions Chapter 4
8. Our coordinate system has i pointed east and pointed north. The ﬁrst displacement
is ii” = (483 km)i and the second is PM = (—966 km)?
(a) The net displacement is
ac = PM +330 =(433 km)i—(966 kmﬁ
which yields ma
1200
(a) Torque with respect to point P is zero:
l 3 "2000lsin(25 o ) "1200 sin(25 o ) + T lsin(90 o ) = 0 2 4 T = 1.47 #10 3 N
(b)# Fx = 0 " Rx $ T cos(25) = 0
!
Rx = 1.47 %10 3 0.906 " Rx = 1.33 %10 3 N
#F
y
= 0 " Ry + T sin(25) $ 2000 $1200
Static Equilibrium
Jessica Savarese
Chelsea Montano
Purpose
The purpose of this experiment is to analyze the balance of forces and torques that are located on
extended bodies which are in static equilibrium.
Instruments
Wooden Stand
Drilled meter stick
Fu
Vector Properties of Forces
Jessica Savarese
Chelsea Montano
Purpose
The purpose of this experiment is to test several cases of objects that are not initially in
translational equilibrium and determine the equilibrants experimentally. We also experimental
Measurements and Uncertainty
Jessica Savarese
Chelsea Montano
Purpose
By measuring the dimensions and masses of the objects (copper wire, silver cylinder, copper
cylinder, and block) it will lead to the determination of the different densities as well as
1/17/14
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California Polytechnic State University
Instructor: Dr. Benzahra
Physics 131 Review test 1
1) A Monkey rst notices a lion attacking when the lion is 12.5 m away and moving
toward the monkey at a speed of 5 m/s. The monkey begins to accelerate away from
th
, Part I (There are 10 multiple choice questions)
I Make sure you put your name, and ID number on the SCANTRON form. The answers for the multiple
‘ choice Questions are to be placed on the SCANTRON. Use a pencil to ﬁll in answers on the
‘ SCANTRON. Make s
Chapter 7
Kinetic Energy and Work
7-1 Kinetic Energy
Energy:
o
o
o
Is a scalar quantity assigned to an object or a
system of objects
Can be changed from one form to another
Is conserved in a closed system, that is the total
amount of energy of all types i
Chapter 6
Force and MotionII
6-1 Friction
Two experiments:
o
o
Push a book at a constant speed across the counter. There
must be an equal and opposite force opposing you,
otherwise the book would accelerate. Again the force is
parallel to the surface and
Dynamics of Uniform Circular Motion
Jessica Savarese
Chelsea Montano
Purpose
The purpose of this experiment was to measure the speed of a body in uniform circular motion,
the radius of its circular path, and the net force acting on it. We used this data t
The Atwood Machine
Jessica Savarese
Chelsea Montano
Purpose
The purpose of this experiment was to examine the predictions of Newtons second law. We used
an apparatus called the Atwood Machine to test if the acceleration of a system is directly
proportiona
PHY 131 Final Exam
Name:_
Q.1 Q.2 Q.3 Q.4 Q.5 Q.6 Total
Directions: Read each problem carefully, and make sure you understand. Please show your work. Even if you give a correct answer with no correct supporting physical reason you will not receive a
Exam 2 - 13302 - Winter 2005 / Dr. Abramzon
Name
Instructions: Closed book you may use ONE 3"X5" card with formulas, which you must turn in with the exam. Read each problem carefully. There are 3 problems, worth a total of 30 points. There is o
Practice Final Exam 133 / Dr. Abramzon Name
Instructions: Closed book you may use ONE 8"X11" card with formulas Read each problem carefully. There are 5 problems, worth a total of 42 points. There is one bonus problem worth an additional 3 point
Exam II 13303 - Winter 2004 / Dr. Abramzon Name
Instructions: Closed book you may use ONE 3"X5" card with formulas Read each problem carefully. There are 5 problems, worth a total of 48 points. There is one bonus problem worth an additional 5 po
Exam I 13303 - Winter 2004 / Dr. Abramzon Name
Instructions: Closed book you may use ONE 3"X5" card with formulas Read each problem carefully. There are 5 problems, worth a total of 47 points. There is one bonus problem worth an additional 5 poi
Final Exam 13303 - Spring 2004 / Dr. Abramzon Name
Instructions: Closed book you may use ONE 8"x11" sheet with formulas Read each problem carefully. There are 7 problems, worth a total of 50 points. There is one bonus problem worth an additional
Exam I 13301 - Winter 2006 / Dr. Abramzon Name
Instructions: Closed book you may use ONE 3"x5" card with formulas only. Read each problem carefully. There are 3 problems, worth a total of 30 points. There is one bonus problem worth an additional
Constant Acceleration Motion
Jessica Savarese
Chelsea Montano
Purpose
To find out if an object (steel ball) is moving with constant acceleration and if so, at what value.
Brief Theory
Formulas
|xx 0|=d
This formula is used to calculate the distance by sub
Chapter 8
Potential Energy and
Conservation of Energy
8-1 Potential Energy
Potential energy U is energy that can be associated
with the configuration of a system of objects that exert
forces on one another
o
Gravitational potential energy Ug: object-earth