November 9, 2010 Page __________ Reflect on your progress during 2 nd 6 weeks: What academic goals have you set? What score did you predict you will get on the next Benchmark? Are you meeting your academic goals? Are you learning the material presented in class? Did you prepare for the test? Record your answer with a minimum of 3 complete sentences. DO NOW – 5 Minutes

November 9, 2010 Update your table of contents: 68. Speed Practice Do Now 69. Balanced and Unbalanced Forces Homework 70. Speed, Velocity, and Acceleration 71.11/2 Do Now and Exit Ticket (practice problems) 72.11/3 Do Now – Is it Balanced? 73.11/5 Do Now – 5 key Points for Test 74.Isaac Newton Reading 75.Newton’s Laws of Motion Foldable DO NOW – 5 Minutes

Today’s Schedule Agenda - PreAP: 1.Comp Book Update 2.Newton’s Laws of Motion Foldable 3.Newton’s Laws of Motion Illustration Essential Questions: How do Newton’s Laws describe motion? What are examples of Newton’s Laws in the real world? Homework: No Homework November 9, 2010 Announcements: Wednesday testing in RODEO – schedule is changed for week.

Newton’s Laws Foldable Create a foldable that includes: The official law The law in your own words A picture or illustration to represent the law A real-world example of the law Important vocabulary or math formulas that go with the law for each of Newton’s 3 Laws of Motion

Today’s Schedule Agenda - GL: 1.Comp Book Update 2.Complete 2 nd 6 weeks test 3.Newton’s Laws of Motion Foldable Essential Questions: How do Newton’s Laws describe motion? What are examples of Newton’s Laws in the real world? Homework: No Homework November 9, 2010 Announcements: Wednesday testing in RODEO – schedule is changed for week.

RUBIES Read and Re-Read the Problem Underline the question [Bracket] Important Information Identify the Main Idea Eliminate the Wrong Answers Select the Best Answer

After the Test Use the Newton’s Laws foldable template to learn about Newton’s Laws of Motion. Attach the template to page 75 in your comp book. Use the book to find your answers. Work quietly on your own.

Describing Motion Newton’s Laws

First we need to define the word FORCE: The cause of motion (what causes objects to move) Two types of forces –Pushes –Pulls REVIEW

Forces are measured in Newtons SI unit of force Symbol: N Measured by using a spring scale REVIEW

Forces may be balanced or unbalanced Balanced forces – all forces acting on an object are equal –There is NO MOTION Unbalanced forces – one or more forces acting on an object are stronger than others –There is MOTION A NET FORCE REVIEW

Newton’s Laws First Law – Inertia Second Law – Acceleration, Force & Mass Third Law – Action-Reaction

First Law Inertia –An object at rest [not moving] remains at rest unless acted on by a force [push or pull]. –An object in motion remains in motion unless acted on by a force [push or pull].

First Law Inertia & Mass –Mass is the amount of matter in an object. –The more MASS an object has, the more INERTIA the object has. –Bigger objects are harder to start & stop.

First Law Example of Newton’s First Law in Action:

Second Law Acceleration & Mass Definitions –Acceleration is a change in velocity [speed or direction]. –Mass is the amount of matter in an object.

Second Law Acceleration & Force –The more force placed on an object, the more it will accelerate [change its motion]. Acceleration & Mass –The more mass [or inertia] an object has, the more force it takes to accelerate the object.

Second Law Force = Mass x Acceleration Example: A 25 g object with an acceleration of 4 m/s 2 will have a force of ______ Newtons.

Second Law Force = Mass x Acceleration Example: A 25 g object with an acceleration of 4 m/s 2 will have a force of 100 Newtons. 25 x 4 = 100

Second Law Force = Mass x Acceleration Falling objects have acceleration due to gravity which is 9.8 m/s 2

Third Law Action – Reaction –Forces are always produced in pairs with opposite directions & equal strengths. –For every force there is an equal and opposite force.

Third Law Action – Reaction –Action – Reaction Forces act on different objects… When you kick a soccer ball, you exert a force on the ball and the ball exerts a force on you. The harder you kick the bigger the force on you (kicking REALLY hard might hurt.)

Third Law

The truck is in motion. What is the force that causes it to stop? The push of the stopped car. The car is at rest. What is the force that causes it to move? The push of the truck.

What about the ladder on top of the truck? The ladder is in motion because the truck is in motion. When the truck stops, the ladder stays in motion. The truck is stopped by the force of the car, but the ladder is not. What force stops the ladder? Gravity.

The truck is in motion, the car is at rest. How do each of these vehicles accelerate? The truck stops moving. The car starts moving. Which one will be the hardest to accelerate? The truck because it has the most mass.

Why does the car move [accelerate] when it is hit by the truck? The heavy and moving truck has more force than the small, at rest car. Why does the truck stop moving when it hits the car? The force of the car pushing back on the truck, plus the force of friction between the massive truck and the road slow down, the stop the truck.

The truck hits the car. An action force stops the truck. What is the equal and opposite reaction force? The force that pushes the car forward.

November 10, 2010 Pick up a handout on your way into class. Be ready to discuss your answers. DO NOW – 5 Minutes

Today’s Schedule Agenda: 1.Motion Problems Do Now 2.Marble Tower Essential Questions: How do Newton’s Laws describe motion? What are examples of Newton’s Laws in the real world? Homework: No Homework November 10, 2010

November 11-12, 2010 Page 76 Write Newton’s 3 Laws of Motion in your own words. Newton’s 1 st Law of Motion says ________ ______________________________________. Newton’s 2 nd Law of Motion says ________ ______________________________________. Newton’s 3 rd Law of Motion says ________ ______________________________________. DO NOW – 5 Minutes

Today’s Schedule Agenda: 1.Newton’s Laws Review 2.Newton’s Laws Station Lab Essential Questions: How do Newton’s Laws describe motion? What are examples of Newton’s Laws in the real world? Homework: Complete Lab Questions November , 2010

EXIT TICKET How is each of Newton’s Laws represented in the picture above?