november 9, 2010 page __________ reflect on your progress during 2 nd 6 weeks: what academic goals...
TRANSCRIPT
November 9, 2010
Page __________
Reflect on your progress during 2nd 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 Now69. Balanced and Unbalanced Forces Homework70. Speed, Velocity, and Acceleration71.11/2 Do Now and Exit Ticket (practice problems)72.11/3 Do Now – Is it Balanced?73.11/5 Do Now – 5 key Points for Test74.Isaac Newton Reading 75.Newton’s Laws of Motion Foldable
DO NOW – 5 Minutes
Today’s ScheduleAgenda - 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 FoldableCreate 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 ScheduleAgenda - GL:
1. Comp Book Update
2. Complete 2nd 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
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.
http://toons.artie.com
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/s2 will have a force of ______ Newtons.
Second Law
Force = Mass x Acceleration
Example: A 25 g object with an acceleration of 4 m/s2 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/s2
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 ScheduleAgenda:
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 1st Law of Motion says ______________________________________________.
Newton’s 2nd Law of Motion says ________ ______________________________________.
Newton’s 3rd Law of Motion says ________ ______________________________________.
DO NOW – 5 Minutes
Today’s ScheduleAgenda:
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 11 - 12, 2010
November 11 - 12, 2010EXIT TICKET
How is each of Newton’s Laws represented in the picture above?