Daily AgendaMs. DeSalvoNovember 7, 2013

Period 1: 7:20 - 7:53Period 2: 7:59 - 8:31Period 3: 8:37 - 9:09Period 4: 9:15 - 9:47Period 5: 9:53 - 10:25Period 6: 10:31 - 11:03Period 7: 11:09 - 11:41Period 8: 11:47 - 12:20

CPS Bell Ringer 11/7/13Activity: A slinky, a slinky…

•Can you name a tool that is used for measuring force?

CPS (Period 6,8)November 7, 2013Last Class(See me for missed work)

• Forces• Notes• Inertia Stations

• Homework 2.1 Newton’s 1st Law of Motion

Today

• Measuring Force• Newton’s 3rd Law• Intro to Spring Scales• Spring scale demos

Period 6: 10:31 - 11:03Period 8: 11:47 - 12:20

CPS Bell Ringer 11/7/13

No Bell Ringer Today!

What is a Force?• A push or a pull

How do we measure a force?Spring ScaleMeasured in Newtons (N)

Pull to:1. 1 N2. 4 N3. 6 N4. 8N5. 10 N

Link 2 Spring Scales Together and Read the spring scale1. Link to a stationary object (your desk) and

pull2. Both partners pull to 3 N3. One partner pull, one partner hold4. Link together, both partners pull and walk

at a constant speed5. Link together, both partners pull and

accelerate your walkConclusion: Force is the same when two

objects interact on one another

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

Newton’s 3rd Law of MotionWhenever 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-reactionForce Pairs

Action-ReactionForces come in pairs

Action: If you push on a table with 10 N

Reaction: the table pushes back on you with 10 NIn the opposite direction

Example #1Action: 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.

Example: Newton’s 3rd LawEx: 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

Example: Newton’s 3rd LawEx: 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-reactionForce Pairs

Example: Newton’s 3rd LawEx: Interaction between tires on car and road

Equal Force in opposite directions

For every action there is:

an equal (in size) & opposite (in direction) reaction

Action-reaction

Force Pairs

Example: Newton’s 3rd LawEx: Interaction between ball and Earth

Action: Earth pulls down on ball

Reaction: Ball pulls up on Earth

Equal Force in opposite directions

BIO Bell Ringer 11/7/13Activity: What is energy?

1. What is the scientific definition of energy?

2. What is an ecosystem?

Biology (Period 2,3,4)November , 2013

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.

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.

Period 2: 7:59 - 8:31Period 3: 8:37 - 9:09Period 4: 9:15 - 9:47

Ecological Foot Print Quiz1. Turn the Ipad on2. Go to settings3. Click WIFI4. Choose “308.1x”5. When prompted, enter your student username and password.

(The one you would use to log on to a school computer.)6. Once you are on the network, go to Safari.7. Search “Ecological Footprint” and go to the quiz.

8. 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!!!