WORK ENERGY

Objectives 

After studying the material of this chapter, you should be able to:

1. Distinguish between work in the scientific sense as compared to the colloquial sense.
2. Write the definition of work in terms of force and displacement and calculate the work done by a constant force when the force and displacement vectors are at an angle.
3. Use graphical analysis to calculate the work done by a force that varies in magnitude.
4. Define each type of mechanical energy and give examples of types of energy that are not mechanical.
5. State the work energy theorem and apply the theorem to solve problems.
6. Distinguish between a conservative and a non-conservative force and give examples of each type of force.
7. State the law of conservation of energy and apply the law to problems involving mechanical energy.
8. Define power in the scientific sense and solve problems involving work and power. 

Reading Guide Questito"Practice Questions"
Complete Practice Problems Problems

• All work should be in your notebook no credit will be awarded if work is absent

Snow day

Read chapter on working energy start with the chapter summary

Post any questions you have

MOMENTUM

Objectives

After studying the material of this chapter, you should be able to:
1. Define linear momentum and write the mathematical formula for linear momentum from memory.
2. Distinguish between the unit of force and momentum.
3. Write Newton's Second Law of Motion in terms of momentum.
4. Define impulse and write the equation that connects impulse and momentum.
5. State the Law of Conservation of Momentum and write, in vector form, the law for a system involving two or more point masses.
6. Distinguish between a perfectly elastic collision and a completely inelastic collision.
7. Apply the laws of conservation of momentum and energy to problems involving collisions between two point masses.
8. Define center of mass and center of gravity and distinguish between the two concepts.(Extra)

HW.   PROBLEMS SET CH7 any 20 to include 12 toatal stars....


Click on link
goto
  VIDEO 15 CONSERVATION OF MOMENTUM
Watch it
Comment on Blog
http://www.learner.org/resources/series42.html?pop=yes&pid=565#

NO AM class

I will not be in tomorrow so you do not have to come in early pass it on...

kinematics graphs review quest

1.Read momentum chapter

         Write down key ideas

2. Click on the link below

http://www.learnapphysics.com/apphysics1and2/kinematics.php

Answer the mc questions in your note book

We will review the answers on Monday

Movie Time!!!

Dr. Good stein is a physics professor at Cal Tech s preemenient engineering and physics university.

Watch the video ask questions (post). Most of this should be a review.

http://youtu.be/6a0-Ry-fufA

Happy New Year!

Graph it!

Hey Santa could use some of these...

Looking for a major?

Looking for a school?

https://www.kickstarter.com/projects/burpg/starscraper-the-next-generation-of-suborbital-rock

In the ? Day of physics...

Play the game.

http://phet.colorado.edu/en/simulation/lunar-lander

What are the key factors?

What are the questions?

5th day of physics...

My physics teacher gave to me a 1meter cube of water.  

How many ml of water is this?

How many grams?

Killiograms?

pounds?

0n the forth day of physics...

Loop d loop

So every thing is always annidea until you put your money where your mouth is...  Watch the video.  

http://m.youtube.com/watch?v=wiZoVAZGgsw

Run the numbers!  

Do they agree?  

If not why?  

What is the force the track exerts on the car at the top of the loop?

What if the top of the track were missing?  How would effect the result?

Does the observation below match your prediction?

http://youtu.be/fpnWZBGpmZE

12 Days of Physics

On the first day of physics...

Discuss the max and mins

http://learnapphysics.com/problem.php

Centripetal Force

• Identify when Fc or ac is occurring.
• Create a proper FBD
• Develop an equation that is the sum of the Forces
• Solve for specified quantities

Practical
"When Pigs Fly"
Use only the forces to calculate the above?
Use the Motion of the object to verify?

Problems & PSS for forces
Draw FBD
Identify Forces
Choose FOR
Break problem into smaller pieces by object or direction or both
write equations from FBD.
See These Examples
(Follow the directions at the top of the page)  or open link on iOS livescribe app

• Tumble Dryrer
• Banking Jet Plane
• Friction
• Incline Plane

REVIEW SITE:

QUESTIONS TEST QUIZZES

Universal Questions

What is Telstar 1?

Why is its invention so important how sis it differ from sputnik?

Describe geosynchronous orbit?

What is asynchronous orbit?

Calculate the conditions required to achieve this on Earth.

HAPPY THANKSGIVING!!!!

• Apply the scoring rubric to your problem
• If you did not receive your problem back send me an email
• see your class policy about sending emails
• Continue to work on Chapter problems in the interim
• Draw and Label Diagrams
• Identify POI
  (PUK)
• Any Problems post to the Blog/Discuss

Problems Set On Calendar

You should be able to set up all the problems but are not expected to solve any past #24.
That means Picture/Unknowns/Knowns
The Equation for most of the problems will be F=ma 
In addition to the problems complete the WS Free Body Diagrams Revisited
Sample Problem & Notes

Forces

F=MA
After studying the material of this chapter, you should be able to:
1. State Newton's three laws of motion and give examples that illustrate each law.
2. Explain what is meant by the term net force.
3. Use the methods of vector algebra to determine the net force acting on an object.
4. Define each of the following terms: mass, inertia, weight and distinguish between mass and weight.
5. Identify the SI units for force, mass, and acceleration.
6. Draw an accurate free body diagram locating each of the forces acting on an object or a system of objects.
7. Use free body diagrams and Newton's laws of motion to solve word problems.

Range equation

Develop a range equation in terms of the variables angle,height,initial launch velocity and gravity.

Case 1: object shot from the ground to the ground

Case 2: object shot from a cliff to the ground

Note: these are really the same equation, But the first is a simplified version and should be easier to figure out and understand.

SHOW ALL WORK.

If you complete this and get bored try to solve the equation for the angle.  Do not start from scratch just use some algebra to rearrange the equation you already have.