1. Do Now 9.14.16 1. pencil How do you know if an object is unbalanced?
What you need for class:
1. pencil
2. composition n.b.
3. textbook
4. homework
How do you know if an object is unbalanced?
If the net force calculated is 0
If there is no motion
If the net force calculated is greater than 0
If the object is traveling at a constant velocity
Reminder: be sure to update your T.O.C. daily and if you are absent to get missing assignments from student station

2. Do Now 9.15.16 1. pencil The best example of balanced forces is
What you need for class:
1. pencil
2. composition n.b.
3. glue stick
4. scissors
The best example of balanced forces is
Car increasing speed
Bus parked in a garage
Ball kicked along a flat surface
Roller coaster slowing down on an incline
Reminder: be sure to update your T.O.C. daily and if you are absent to get missing assignments from student station

3. Do Now 9.16.16 1. pencil What you need for class: 2. composition n.b.
3. note: when you complete your bell ringer sheet please pass it to the front of your row and that person will place it in metal tray at student station
An airplane is flying with a net force of zero. This means the airplane is
Slowing down and losing altitude
Moving at a constant speed and losing altitude
Slowing down and traveling along a straight line
Moving at a constant speed and traveling in a straight line
Reminder: be sure to update your T.O.C. daily and if you are absent to get missing assignments from student station

4. Do Now 9.19.16 Two students are pushing a sofa across a room.
What you need for class:
1. pencil
2. composition n.b.
3. new bell ringer paper on chair
4. Calculator
What is the net force applied to the sofa by the students?
150 N
200 N
250 N
400 N
Reminder: be sure to update your T.O.C. daily and if you are absent to get missing assignments from student station

5. F=MA foldable
Flap 1: Force= Mass x Acceleration Flap 2: F=MA F= .42kgx 25 m/s² F= 10.5 N Flap 3: F=MA 20N= .5kg x A 20N/5kg= A Acceleration= 4 m/s² Flap 4: F=MA F= .300 kg x 4m/s² F= 4N
Step 1: fold along dotted line Step 2: Cut along solid line for each flap Step 3: under each flap put the following information

6. Exit Ticket
A force of 64N is applied to an 8kg mass. What is the acceleration of the mass? Solve. Show work and units.
*first and last name & Class period

7. Acceleration 1. Emma Leopard 2. Kevin Marshall 3. Nixon Nataren
4. Marshall Robinson
5. Ashley Shumacher
6. Hal Seymour
7. Caylin Shuford
8. Madison Shuster
9. Jonathan Simmons
10.Shekinah Stokes
11.Tanner Tavano
12. Abby Thomas
13. Ceci Thomas
14. Megan Trent
15. Jolene Velazquez
16. Hannah Waterman
17. Bella Waters
18. Owen Wells
19. Jayla Williams
20. Nathan Williams
21.Brice Williamson
22. Emily Willis
23. Riley Wise
24. Brianna Wright
25. Carolyn Yonn

8. 8th period
Roller Coaster Ideas

9. Review Complete this assignment on pg. 24 in your science notebook
Turn to page 361 in
your textbook.
2.Define the vocabulary
(4 terms)
3. Read pages
4. Copy & Answer the “check your reading” questions
- ( 4 total)

10. Newton's Laws

11. Newton’s Contributions
Calculus
Light is composed of rainbow colors
Reflecting Telescope
Laws of Motion
Theory of Gravitation

12. Newton’s First Law (law of inertia)
An object at rest tends to stay at rest and an object in motion tends to stay in motion unless acted upon by an unbalanced force.

13. Equal forces in opposite directions produce no motion
Balanced Force
Equal forces in opposite
directions produce no motion

14. Unequal opposing forces produce an unbalanced force
Unbalanced Forces
Unequal opposing forces
produce an unbalanced force
causing motion

15. If objects in motion tend to stay in motion, why don’t moving objects keep moving forever?
Things don’t keep moving forever because there’s almost always an unbalanced force acting upon them.
A book sliding across a table slows down and stops because of the force of friction.
If you throw a ball upwards it will eventually slow down and fall because of the force of gravity.

16. Newton’s First Law (law of inertia)
MASS is the measure of the amount of matter in an object.
It is measured in Kilograms

17. Newton’s First Law (law of inertia)
INERTIA is a property of an object that describes how ______________________ the motion of the object
more _____ means more ____
much it will resist change to
mass
inertia

18. 1st Law
Unless acted upon by an unbalanced force, this golf ball would sit on the tee forever.

19. Friction! There are four main types of friction:
What is this unbalanced force that acts on an object in motion?
Friction!
There are four main types of friction:
Sliding friction: ice skating
Rolling friction: bowling
Fluid friction (air or liquid): air or water resistance
Static friction: initial friction when moving an object

20. 1st Law
Once airborne, unless acted on by an unbalanced force (gravity and air – fluid friction) it would never stop!

21. Inertia

22. Terminal Velocity

23. Friction and Inertia Foldable
The resistance that one surface or object encounters when moving over another surface.
Inertia:
A tendency to do nothing or remain unchanged. Inertia is a property of matter.
Examples:
Book sitting on a shelf.
Continuing to move when a car stops suddenly.
3. Leaning to the side as a vehicle quickly turns.

24. Newton’s Second Law
Force equals mass times acceleration.
F = ma

25. Newton’s Second Law 70 Newtons Force = Mass x Acceleration
Force is measured in Newtons
ACCELERATION of GRAVITY(Earth) = 9.8 m/s2
Weight (force) = mass x gravity (Earth)
Moon’s gravity is 1/6 of the Earth’s
If you weigh 420 Newtons on earth, what will you weigh on the Moon?
70 Newtons
If your mass is 41.5Kg on Earth what is your mass on the Moon?

26. WEIGHT is a measure of the force of ________ on the mass of an object
Newton’s Second Law
WEIGHT is a measure of the force of ________ on the mass of an object
measured in __________
gravity
Newtons

27. Newton’s Second Law One rock weighs 5 Newtons.
The other rock weighs 0.5
Newtons. How much more
force will be required to
accelerate the first rock
at the same rate as the second rock?
Ten times as much

28. For every action there is an equal and opposite reaction.
Newton’s Third Law
For every action there is an equal and opposite reaction.

29. Newton’s 3rd Law
For every action there is an equal and opposite reaction.
Book to
earth
Table to
book

30. Think about it . . .
What happens if you are standing on a skateboard or a slippery floor and push against a wall? You slide in the opposite direction (away from the wall), because you pushed on the wall but the wall pushed back on you with equal and opposite force.
Why does it hurt so much when you stub your toe? When your toe exerts a force on a rock, the rock exerts an equal force back on your toe. The harder you hit your toe against it, the more force the rock exerts back on your toe (and the more your toe hurts).

31. Newton’s Third Law
A bug with a mass of 5 grams flies into the windshield of a moving 1000kg bus.
Which will have the most force?
The bug on the bus
The bus on the bug

32. Newton’s Third Law The force would be the same. Force (bug)= m x A
Force (bus)= M x a
Think I look bad?
You should see
the other guy!

33. Action and Reaction on Different Masses
Consider you and the earth
Action: earth pulls on you
Reaction: you pull on earth

34. Action: tire pushes on road Reaction: road pushes on tire

35. Reaction: gases push on rocket
Action: rocket pushes on gases

36. Consider hitting a baseball with a bat
Consider hitting a baseball with a bat. If we call the force applied to the ball by the bat the action force, identify the reaction force.
(a) the force applied to the bat by the hands
(b) the force applied to the bat by the ball
(c) the force the ball carries with it in flight
(d) the centrifugal force in the swing
(b) the force applied to the bat by the ball

37. Newton’s 3rd Law
Suppose you are taking a space walk near the space shuttle, and your safety line breaks. How would you get back to the shuttle?

38. Newton’s 3rd Law
The thing to do would be to take one of the tools from your tool belt and throw it is hard as you can directly away from the shuttle. Then, with the help of Newton's second and third laws, you will accelerate back towards the shuttle. As you throw the tool, you push against it, causing it to accelerate. At the same time, by Newton's third law, the tool is pushing back against you in the opposite direction, which causes you to accelerate back towards the shuttle, as desired.

39. What Laws are represented?

41. Review Newton’s First Law:
Objects in motion tend to stay in motion and objects at rest tend to stay at rest unless acted upon by an unbalanced force.
Newton’s Second Law:
Force equals mass times acceleration (F = ma).
Newton’s Third Law:
For every action there is an equal and opposite reaction.

42. Newton's Laws
1stlaw: Homer is large and has much mass, therefore he has much inertia. Friction and gravity oppose his motion.
2nd law: Homer’s mass x 9.8 m/s/s equals his weight, which is a force.
3rd law: Homer pushes against the ground and it pushes back.