1. Daily Agenda Ms. DeSalvo November 7, 2013
Period 1: 7:20 - 7:53 Period 2: 7:59 - 8:31 Period 3: 8:37 - 9:09 Period 4: 9:15 - 9:47 Period 5: 9: :25 Period 6: 10: :03 Period 7: 11: :41 Period 8: 11: :20
Ms. DeSalvo
November 7, 2013

2. CPS Bell Ringer 11/7/13 Activity: A slinky, a slinky…
Can you name a tool that is used for measuring force?

3. CPS (Period 6,8) November 7, 2013 Measuring Force Today Last Class
Period 6: 10: :03 Period 8: 11: :20
Today
Measuring Force
Newton’s 3rd Law
Intro to Spring Scales
Spring scale demos
Last Class
(See me for missed work)
Forces
Notes
Inertia Stations
Homework 2.1 Newton’s 1st Law of Motion

4. CPS Bell Ringer 11/7/13
No Bell Ringer Today!

5. What is a Force?
A push or a pull

6. How do we measure a force?
Spring Scale
Measured in Newtons (N)
Pull to:
1 N
4 N
6 N 8N
10 N

7. Link 2 Spring Scales Together and Read the spring scale
Link to a stationary object (your desk) and pull
Both partners pull to 3 N
One partner pull, one partner hold
Link together, both partners pull and walk at a constant speed
Link together, both partners pull and accelerate your walk
Conclusion: Force is the same when two objects
interact on one another

8. Force Q: Can there be a force only on the puck and not on the string?
No, always need two objects
Between two objects
A push or a pull
that causes an acceleration or a change
Force

9. Newton’s 3rd Law of Motion
Whenever one object exerts a force on a second object,
the second object exerts an
equal and opposite force
on the first.
For every action there is an equal and opposite reaction
Action-reaction
Force Pairs

10. Action-Reaction Forces come in pairs
Action: If you push on a table with 10 N
Reaction: the table pushes back on you with 10 N
In the opposite direction

11. Example #1 Action: A baseball pushes a glove to the left with 8 N.
What is the reaction force?
Reaction: A glove pushes a baseball to the right with 8 N.

12. Example: Newton’s 3rd Law
Ex: Bird uses its wings to fly. Action: Wings push air downwards with 10 N Reaction: Air pushes the bird upwards with 10 N Equal Force in opposite directions

13. Example: Newton’s 3rd Law
Ex: Interaction between a baseball and bat Action: Baseball forces the bat to the left at 12 N Reaction: The bat forces the ball to the right 12 N
Action-reaction
Force Pairs

14. Example: Newton’s 3rd Law
Ex: Interaction between tires on car and road Equal Force in opposite directions
Action-reaction
Force Pairs
For every action there is:
an equal (in size) & opposite (in direction) reaction

15. Example: Newton’s 3rd Law
Ex: Interaction between ball and Earth
Action: Earth pulls down on ball
Reaction: Ball pulls up on Earth
Equal Force in opposite directions

16. BIO Bell Ringer 11/7/13 Activity: What is energy?
What is the scientific definition of energy?
What is an ecosystem?

17. Biology (Period 2,3,4) November , 2013
Period 2: 7:59 - 8:31 Period 3: 8:37 - 9:09 Period 4: 9:15 - 9:47
Today
Ipads – Ecological Foot Print Quiz
Do not change any setting on the ipad, do not use it for anything except what you are directed to do.
Last Class
(See me for missed work)
Test Today!
Please be seated.
Get out your study guide.
Get out a pen or pencil and wait quietly for directions.

18. Ecological Foot Print Quiz
Turn the Ipad on
Go to settings
Click WIFI
Choose “308.1x”
When prompted, enter your student username and password. (The one you would use to log on to a school computer.)
Once you are on the network, go to Safari.
Search “Ecological Footprint” and go to the quiz.
Begin the quiz, answer the questions the best you can. Make approximations where you are unsure. When you are done, write down the quiz results. I will collect it for a grade!!!