Todays physics topics:
Are you back from Spring Break? (mentally)
Do you still remember x, vx, ax and the kinematic
equations for constant acceleration?
The previous class I talked about the analogous rotational
quantities , , .
Tangential motion around a
Motion in one dimension
9899
Sections 2.1  2.5
Motion in 1 dimension
We live in a 3dimensional world, so why bother analyzing 1dimensional situations? Basically,
because any translational (straightline, as opposed to rotational) motion problem can b
Assorted forces, and applying Newton's laws
92299
Sections 4.6  4.7
Forces can come from various sources. Whenever two objects are touching, they usually exert
forces on each other, Newton's third law reminding us that the forces are equal and opposite
Newton's laws of motion
92099
Sections 4.1  4.5
Force
We've introduced the concept of projectile motion, and talked about throwing a ball off a cliff,
analyzing the motion as it traveled through the air. But, how did the ball get its initial velocity i
More circular motion
10199
Sections 5.3  5.5
Cars on banked turns
A good example of uniform circular motion is a car going around a banked turn, such as on a
highway offramp. These offramps often have the recommended speed posted; even if there
was n
Introduction to Physics
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Sections 1.1  1.8 and Appendix A
If you were taking a trip to Greece, you'd get the most out of your trip if you learned some Greek
before going. Knowing a little of the language would help you somewhat; being fluent in the
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Motion in two dimensions
91599
Sections 3.5  3.7
Extending things from 1 dimension
In 1 dimension, we wrote down some general equations relating velocity to displacement, and
relating acceleration to the change in velocity. We also wrote down the four
Constant Acceleration
91099
Sections 2.6  2.7
Applying the equations
Doing a sample problem is probably the best way to see how you would use the kinematics
equations. Let's say you're driving in your car, approaching a red light on Commonwealth
Avenue
Todays topics
Fixed axis rotation  angular variables
Angular kinematics  analogy to linear
Ferris Wheel
The Original One !
Chicago Worlds Fair,
1893
80 m high, slightly less than StuVi 2
R = 38 m, 2 revolutions for 50
Loading revolution: 11 min
Contin
Todays Physics Topics
Stick on string (demo)
Also see the extra slides
that I added to the Friday lecture notes.
Springs and Simple Harmonic Motion
What happens when the string breaks?
1. The center of mass falls
with acceleration g.
2. The stick remains
Todays Physics
More rotational analogies
Rotational Kinetic Energy Krot = I2
Angular Momentum L = I
Demos of the importance of r2 in I
Rotational collisions:
Angular momentum is conserved if there
is no external torque
An offcenter particle carries
L
Todays Topic Pressure
For test review material go to:
http:/www.upworthy.com/if3littlegirlsdidthistomyhouseiddoeverythingicouldtogetthemfullridestostanford?c=reccon1
Definition of pressure F/A 1 Pa = 1 N/m2
Water pressure with depth an
Todays Physics Topics
Equilibrium between phases
Vapor pressure
Humidity
Convection
Thermal conductivity
Thermal radiation
Saturated Vapor Pressure
Only when the temperature and vapor pressure correspond to a point
on the curved line do the liquid and vap
Todays Physics Topics
SHM equations, graphs, and maximum quantities
Elastic potential energy
PEspring = k s2 ; if s is measured from the unstretched
length, this is only the energy stored in the spring
and does not include PEgravity = mgh
PEsystem of sp
Next Physics Topics
Translational energy (3/2)kBT per molecule +
calculation of pressure from momentum transfer
gives Ideal Gas Law: PV = nRT
PV diagrams Area = (N/m2)(m3) = Nm = joules
Isotherms (T = const)
Examples
First Law of Thermodynamics
(Thermal
Graphical analysis; and Vectors
91399
Sections 2.8  3.4
Graphs
Drawing good pictures can be the secret to solving physics problems. It's amazing how much
information you can get from a diagram. We also usually need equations to find numerical
solutions
i!
Dchnitlon =0ne Dimension "nw'
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Define xy coerdinotes.
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"Pamela": rcpyesems a (emplex object
Susie Hu
Mrs. Seagroves
Physics Period D
November 11th 2012
Physics lab(October sky)
Introduction:
The Movie October sky talks about Homer who was inspired by how to build a rocket. With
his friends, they set to do it. No one in the town believe they coul
Susie Hu
Mrs. Seagroves
Physics Period D
December 1st 2012
Physics Lab (Rotating equilibrium)
Introduction:
In this lab we balance the meter stick which is placed on a fulcrum. First time we put
the fulcrum at the 30.0 cm mark place a hanger on the 10 cm
Susie Hu
Mrs. Seagroves
Physics Period D
November 25th 2012
Lab Report(friction)
Introduction:
In this lab we measured the coefficient of kinetic friction for an object sliding on an wood board. We
will demonstrate that the friction force is independent o
Susie Hu
Mrs. Seagroves
Physics period D
January 6th 2013
Momentum Lab
Introduction:
In this lab we use air track, bouncing balls, car smash, can race spinning chairs and
Cronkinole in total six stations to demonstrate momentum, angular momentum, conserva
Susie Hu
Mrs. Seagroves
Physics period D
January 13th, 2013
Physics Lab(simple Machine)
Introduction:
In this lab we have three stations. In station one we pull objects on an incline plane with
different angles. In station two, we use pulley to pull an ob
Susie Hu
Mrs. Seagroves
Physics period D
December 15th 2012
Lab Report (Pendulum)
Introduction:
In this lab we tied an object on a string and and let it swing in different length for 30 times
and get the time of it, calculate the theoretical period.
Theor
Susie Hu
Mrs. Seagroves
Physics Period D
March 2rd 2013
Physics Lab (specific Heat)
Introduction:
In this lab we calculate the specific heat of bronze, plastic and braze by putting them into
boiling water and then into colder water and see the temperature