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Due: 10:00am on Tuesday, October 26, 2010
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Assignment 3
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Due: 10:00am on Tuesday, October 12, 2010
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Due: 10:00am on Tuesday, November 9, 2010
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Assignment 1
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Due: 10:00am on Thursday, September 30, 2010
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MasteringPhysics: Course Home
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Assignment 4
Due: 10:00am on Tuesday, October 19, 2010
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4.45.
Model:
Visualize:
Solve:
The particle model for the ball and the constant-acceleration equations of motion are assumed.
(a) Using y1 # y0 $ v0 y ! t1 % t0 " $ 1 a y ! t1 % t0 " ,
2
2
h # 0 m $ ! 30 m/s " sin 60& ! 4 s % 0 s " $ 1 ! %9.8 m/s 2 " ! 4
. Starting from rest. a l2cm-diametcr compact disk takes 3.0 s
to reach its operating angular velocity of 2000 rpm. Assume
that the angular acceleration is constant. The disks moment
ofittertia i525 x 10'5 kg ml.
a. How much torque is applied to the dis
9.34. Model: Model the skaters as particles. The two skaters, one traveling north (N) and the other traveling
west (W), are a system. Since the two skaters hold together after the collision, this is a case of a perfectly
inelastic collision in two dimensi
131I AU10
Midterm #2
Potentially Useful Information
1
x f = xi + vi t + at 2
2
v f = vi + at
v f = vi + 2a ( x f xi )
2
2
dx
dt
dv
a=
dt
v=
r
r
F = ma
Fx = max
F
y
= ma y
W = mg
Fs = kx
f k = k N
f s s N
v2
a=
r
v = r
d
=
dt
g = 9.8 N / kg = 9.8m / s 2
r
Introduction to Logger Pro
This section of the lab manual is intended as a resource for understanding the
fundamentals of the hardware and software used for data collection and analysis in this
Physics laboratory course. As this introduction will not prov
1.55. Model: The car is represented by the particle model as a dot.
Solve:
(a)
Time t (s)
0
10
20
30
40
50
60
70
80
90
(b)
Position x (m)
1200
975
825
750
700
650
600
500
300
0
2.4. Solve: (a) The time for each segment is
and
The average speed to the hou
8.6.
Model: Treat the block as a particle attached to a massless string that is swinging in a circle on a
frictionless table.
Visualize:
Solve:
(a) The angular velocity and speed are
" # 75
rev 2! rad
1min
$
# 471.2 rad/min vt # r" # % 0.50 m & % 471.2 ra
11.48. Model: Identify the truck and the loose gravel as the system. We need the gravel inside the system
because friction increases the temperature of the truck and the gravel. We will also use the model of kinetic
friction and the conservation of energy
7.29. Model: Assume package A and package B are particles. Use the model of kinetic friction and the
constant-acceleration kinematic equations.
Visualize:
Solve: Package B has a smaller coefficient of friction. It will try to overtake package A and push a
Below is a position vs. time plot, which describes the
motion of a car. At what point is the displacement
from the origin greatest?
x
B
0 of
100
100
B
0%
A
=
A
A
0%
B
0%
t
1. PointA
2. PointB
3. DisplacementisequalatpointAandpointB
10
Below is a position
You do not need the 131 Lab Manual. Everything you need for lab in this course will be
on Carmen for you to print out and bring to lab. All you need to bring to lab is a lab
notebook. If you bought a 131 Lab Manual bring it back to the bookstore for a ref
12.10. Model: The triangle is a rigid body rotating about an axis through the center.
Visualize: Please refer to Figure EX12.10. Each 200 g mass is a distance r away from the axis of rotation,
where r is given by
0.20 m
0.20 m
! cos30" # r !
! 0.2309 m
r
12.22. Model: The disk is a rotating rigid body.
Visualize:
The radius of the disk is 10 cm and the disk rotates on an axle through its center.
Solve: The net torque on the axle is
! = FA rA sin "A + FB rB sin "B + FC rC sin "C + FD rD sin "D
= (30 N )(0.
10060001_1
A ladybug sits at the outer edge of a merry-go-round, and a
gentleman bug sits halfway between her and the axis of
rotation. The merry-go-round makes a complete revolution
once each second. The gentleman bugs speed is
Gentleman bug
bug
gentlema
2.17. Model: We represent the ball as a particle.
Visualize:
Solve: Once the ball leaves the students hand, the ball undergoes free fall and its acceleration is equal to the
acceleration due to gravity that always acts vertically downward toward the cente
9.30. Model: Model the rubber ball as a particle that is subjected to an impulsive force when it comes in contact
with the floor. We will also use constant-acceleration kinematic equations and the impulse-momentum theorem.
Visualize:
Solve: (a) To find th
Physics 131 in Fall, 2010
Midterm #1
Potentially Useful Information
1
x f = xi + vi t + at 2
2
v f = vi + at
v f 2 = vi 2 + 2a ( x f xi )
dx
dt
dv
a=
dt
v=
F = ma
F = ma
F = ma
x
x
y
y
W = mg
f k = k N
f s s N
g = 9.8 N / kg = 9.8m / s 2
Experiment 4: the Monster Truck and Airplane Flier Problems
Goal: Apply free body diagrams and their corresponding force equations to more complex
situations.
Activity 1, the monster truck:
1. Clean the track and dont touch its surface after it has been c
MasteringPhysics: Course Home
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12/4/10 3:04 PM
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Assignment 11
Due: 11:00pm on Sunday, December 5, 2010
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Rotational Kinematics and Dynamics
Goals:
Become familiar with the rotational kinematic variables such as angular position ,
angular velocity and angular acceleration .
Learn to apply Newtons 2nd Law in angular form: " = I! , where is torque, I is the
m
FEH Physics Request for Regrading
Your name:_ TAs name
_
Exam regrade is requested for (please circle)
Group MT1
Individual MT1
Group MT2
Individual MT2
Final
Problem(s) to be regarded: _
(Please note that a change of grade may only be made by the instruc