yeung (sy5788) HW#7Gravitation hester (WVPHYSICSC2011)
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001 10.0 points
Consider the orbit of a typical comet around
yeung (sy5788) HW#2 - 2D Motion hester (WVPHYSICSC2011)
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REMEMBER, HOMEWORK IS DUE AT
9PM CALIFORNIA TIME! THE TIME
Chapter 4
Motion in Two Dimensions
Quick Quiz 4.1
Which of the following cannot possibly be accelerating?
(a) An object moving with a constant speed
(b) An object moving with a constant velocity
(c) An object moving along a curve
Quick Quiz 4.1
Answer: (b
yeung (sy5788) HW#3 - Forces I hester (WVPHYSICSC2011)
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4.
1
friction
weight
force
001 (part 1 of 2) 10.0 points
A b
Friction is a force that oppose
motion.
Isfrictionagoodthing?
Two Groups of Friction
(1)Static frictionthefrictionalforce(resistiveforce)
thatpreventsanobjectfromstartingtomove
(2)Kinetic frictionthefrictionalforce(resistive
force)ofamovingobject
Kinetic
Kinematics
Kinematics
Conceptualquestionsfrom
Serway&Jewetts6thedition
and
Halliday,Resnick&Walker7thedition
Quick Quiz 4.1
Which of the following cannot possibly be accelerating?
(a) An object moving with a constant speed
(b) An object moving with a cons
QUICK QUIZ 3.1
(middle of section 3.3)
In most cases, the sum of the magnitudes of two vectors is
a) less than b) greater than, or c) equal to the magnitude of the
sum of two vectors?
QUICK QUIZ 3.1 ANSWER
(b). Only in the case when two vectors are parall
Chapter 2
Motion in One Dimension
Quick Quiz 2.1
Under which of the following conditions is the magnitude of
the average velocity of a particle moving in one dimension
smaller than the average speed over some time interval?
(a) A particle moves in the + x
Chapter 3
Vectors
Quick Quiz 3.1
Which of the following are vector quantities and which are
scalar quantities?
(a) your age
(b) acceleration
(c) velocity
(d) speed
(e) mass
Quick Quiz 3.1
Answer: Scalars: (a), (d), (e). None of these quantities has a
dire
Slow mo balloon:
http:/www.youtube.com/watch?NR=1&v=_HNve7bekeM
How does this demonstrate Newtons 1st Law?
A little bar trick:
http:/www.metacafe.com/watch/387492/wine_glass_bartrick_dkb_movies/
The Old table cloth trick:
http:/www.metacafe.com/watch/5199
Four Major Types of
Four
Two Dimensional Motion
1. Projectile Motion
1. Projectile
2. Circular Motion
2. Circular
3. Rotational Motion
3. Rotational
4. Periodic Motion
4. Periodic
Projectile motion problems are best solved by
Projectile
treating horizonta
Forces & Newtons
Forces
Identifying and defining forces
Laws Diagrams
Laws
Free Body
Gravitational Forces
Mass and weight
The Law of Inertia
The Law of Acceleration
The Law of Force-Counterforce
Normal force, Tension, and friction
The vector nature of fo
-Newtons Laws
-Newtons
AP Physics
Galileos Experiment with Ball
Galileos
A force is not required to keep the ball moving on a horizontal
plane.
In the absence of friction, the ball would move perpetually.
Newtons First Law
Newtons
Isaac
1st
Newton -Englan
VectorsandScalars
AP Physics C
Scalar
A SCALAR is ANY
quantity in physics that
has MAGNITUDE, but
NOT a direction
associated with it.
Magnitude A numerical
value with units.
Scalar
Example
Magnitude
Speed
20 m/s
Distance
10 m
Age
15 years
Heat
1000
calori
yeung (sy5788) HW#1 - 1D Motion hester (WVPHYSICSC2011)
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Remember that Homework is ALWAYS
DUE AT 9pm CALIFORNIA TI
QUICK QUIZ 4.1
(end of section 4.1)
A birds eye view of a blue car traveling on a circular track is
shown below. The car speeds up so that its speed at point B is
twice its speed at point A. The average acceleration direction
between points A and B is bes
QUICK QUIZ 2.1
A car with a dripping gas tank travels along a road in a straight
line. A drop falls from the gas tank every five seconds and over a
section of road the spots from the gasoline can be used to
determine the average speed of the car. From the
yeung (sy5788) HW#1 - 1D Motion hester (WVPHYSICSC2011)
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Remember that Homework is ALWAYS
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Forces - II Conceptual Question Solutions
6.1. (a) F1, F2, F3
(b) all same; coefficient of friction and normal force are same in all cases, so static
friction must be the same.
ur
u
6.2. (a) stays same; remember that Fnet = 0; since F1 doesnt change, then
Chapter 5 Conceptual Questions Solutions
5.1. (a) 2
(b) 2
ur
u
5.3. increase; when is decreased, it puts more of the force from F1 in the x-direction.
uu
r
In order to balance the forces, we must increase F2 .
5.4. (a) 2, 3; if you take the double derivat
yeung (sy5788) HW4 - Force II hester (WVPHYSICSC2011)
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001 (part 1 of 2) 10.0 points
An amusement park ride consists
QUICK QUIZ 12.1
(end of section 12.1)
Consider the object in Figure 12.1 with a single force acting on it and
applied at a point that is not at the center of mass of the object (nor does the force
lie along a line that passes through the center of mass of
Chapter 5
The Laws of Motion
Quick Quiz 5.1
Which of the following statements is most correct?
(a) It is possible for an object to have motion in the absence
of forces on the object.
(b) It is possible to have forces on an object in the absence
of motion
Chapter 6
Circular Motion and
Other Applications of
Newton's Laws
Quick Quiz 6.1a
You are riding on a Ferris wheel that is rotating with
constant speed. The car in which you are riding always
maintains its correct upward orientation - it does not invert.
Chapter 12
Static Equilibrium and
Elasticity
Quick Quiz 12.1
Consider the object subject to the two forces in the figure
below. Choose the correct statement with regard to this
situation.
(a) The object is in force
equilibrium but not torque
equilibrium.
QUICK QUIZ 6.1
(beginning of section 6.1)
On a Ferris wheel, you travel at a constant speed in a circle in a
vertical plane. The relationship between the magnitudes of the
normal force of the seat on you when you are at the top, n t, at the
bottom, nb, or
QUICK QUIZ 5.1
(end of section 5.3)
You and your friend have been working on the railroad the entire day,
using sledge hammers to drive spikes into the railroad ties. Because you are both
tired, you try to find a method that will make the job easier. Your
yeung (sy5788) HW#6 Rotational motion hester (WVPHYSICSC2011)
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001 10.0 points
The rigid body shown in the diagram a
LAB 1. ELASTIC & INELASTIC COLLISIONS
Question: Is momentum conserved in elastic and inelastic collisions? is kinetic energy conserved?
System: 2 cars only
Elastic equal mass
Elastic unequal mass
Inelastic equal mass
Inelastic unequal mass
LAB 2: Ballisti