Friday (Sep 24):

 

Concept: Temp & Review Test

 

Show Homework Stamps

 

Journal:

1. Why isn't everything (you, your dog, the air, etc.) on the Earth flung off into space as the Earth rotates at such a high speed? Explain

2. When you jump up into the air, why do you land in the same spot since the Earth is moving at enormous speed underneath you? Explain

3. What is a force?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1. Gravity is stronger than the inertia that would throw us off the earth.

2. Inertia with both you and the air above you (atmosphere). All is moving together, like we are in a bus or airplane that is moving.

3.

"A force is an interaction between two (material) objects involving a push or a pull."

 

First, a force is an "interaction".

  1. To have a force, you have to have 2 objects - one object pushes, the other gets pushed . In the definition, "(material) objects" means that both objects have to be made out of matter - atoms and molecules. They both have to be "things", in the sense that a chair is a "thing".
  2. A force is something that happens between 2 objects. It is not an independently existing "thing" (object)

 

Let's think about this clearly and simply.

First, forces require:

  1. a push or pull,
  2. an object getting pushed or pulled,
  3. and an object doing the pushing or pulling

 

 

 

 

 

Re-Take Test Monday or Tues Morning

(27 & 28 Sep)

 

 

 

 

 L#7:  1-3, 7 - 14, 17   Due Mon 27 Sep (Motion & Avg Acceleration)

 

Tues 28 Sep Lab: Gum (Bring your own)

 

 L #8: 1- 7, 12, 15, 18    Due Wed 29 Sep  (Friction)

 

Thurs/Fri    30Sep/1 Oct Library ( Key scientists)

 

Monday 4 Oct Lab: Graphing Motion

 

Power Point (Key Scientists)due Tuesday 5 Oct

 

L #10: 1- 3, 7 - 10, 14, 17    Due Wed 6 Oct (Motion Graphs)

 

Thursday 7 Oct: Review of Newton's Laws

 

L #11:  1- 4, 9, 11,  13, 15, 18 Due Mon 11 Oct (Newton's 2nd & 3rd)

 

Tues 12 Oct Lab: Ball Toss

 

 

L #14:  1- 3, 5, 10, 11, 14 Due  13 Oct  (Free Body)  

 

 

Thurs 13 Oct:

Re-View for Test tomorrow on Newton's Laws

 

 

Fri 15 Oct: Test Newton's Laws

 

 

 

L #9: 1- 8,  11-16    Due Tues 19 Oct (Torque)

 

 

 

Finish Film:

 

 

 

 

 

 

 

Assessment:

Re-Draw graph

 

 

 

 

 

1.    How far did the cart travel in the first 10 minutes? What was its average acceleration during this time interval? 

2.    Briefly describe its behavior between 10 and 15 minutes?

3.    What was its average acceleration between 10 and 15 minutes? 

4.    How far did it travel between 15 and 30 minutes? What was its average acceleration during this time interval? 

5.    How far did it travel between 30 and 40 minutes? What was its average acceleration during this time interval? 

6.    How far did it travel between 40 and 55 minutes? What was its average acceleration during this time interval? 

7.    What was the total distance it traveled? What was its final displacement? 

8.    What was the cart's average speed for the entire 55 minutes? its average velocity? 
 

 

 

 

 

  1. 300 meters, 6 m/min2
  2. it traveled 300 meters at a constant velocity of 60 m/min during these 5 minutes
  3. 0 m/min2
  4. 450 meters, -4 m/min2
  5. -200 meters, -4 m/min2
  6. -300 meters, 2.7 m/min2
  7. 1550 meters, +550 meters
  8. 28.2 m/min and 10.0 m/min