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Physics is the study of motion.

A reference point is used to compare motion.
1.  Are you moving right now?
(I don't mean breathing, writing, or fidgeting in your seat)
2.  What is the speed of something going 10 Km in 2 hours?
3.  What is the formula for speed?

4.  Name 3 things you use as a reference point. Average speed is total distance divided by total time.

Instantaneous speed is the speed at any one time.

UNITS ARE MORE IMPORTANT THAN NUMBERS!
Velocity is speed in a direction.
Formula - substitute - answer with units

1.  If a plane goes 50km in 5 hours, what is its speed?

2.  What is the distance something moved
if it was 20km/hour for 4 hours?

3.  Which way is down?

Acceleration is how much your velocity is
changing in a given time.
Acceleration is ANY change in speed OR direction.

Acceleration = Final speed - Initial speed (change in speed)
time

1. If the speed started at zero and you got to
2 m/s in one second, what is the acceleration?

2.  If a ball was moving at 10m/s and got to 50 m/s
in 4 seconds, what is the acceleration?

3.  Is the moon accelerating?

1.   What is the acceleration if a car accelerates
from a red light to 10 m/s in 2 seconds? 2.  What is the motion of:
A
B
C
D 1.  What is the motion of the red line's object?
2.  What is the motion of the blue line's object?
3.  What is the motion of the yellow line's object?

STARTING NOW!  If I see a student not following directions,
everyone will say:

1.  Units are more important than numbers!

2.  Physics needs 3 steps!

3.  ID the variables!

CONSTANT SPEED = NO ACCELERTION
CONSTANT ACCELERATION = CHANGING SPEED OR DIRECTION

Circle what you are asked to find.
Put letters above every variable (number).

1.  How long did it take a bat to fly 30 kilometers at 3km/hour?
2.  If a car traveling at 10m/s drives for 10s, how far did it travel?
3.  If a car got to 30km/hour after it was moving at 50km/hour
for 2 hours, what was the car's acceleration?
4.  What do you need to know to calculate the speed are we traveling       due to the spinning of the Earth?

Displacement - the distance from origin to end point.
it does NOT include total distance.

1.  If Joe walked 5km north then 3km south,
what was his displacement?

2.  If it took 2 hours, what was his average velocity?

3.  If a ball started rolling down a hill and it got to
5m/s in 10 seconds, what is the acceleration?

A force is a push or pull.
A force causes changes in movement.
Net force is when all the forces are added together.

Force MUST have a direction and strength.
Force is measured in newtons (N).

g = 9.8m/s2

1.  What forces are on you right now? What are the net forces on the boxes?

A balanced force does not cause changes in motion.
An unbalanced force always causes changes in motion.

Opposing forces cancel!

gravity = 9.8m/s2

1.  When is gravity acting on you and it's balanced?
2.  When is it unbalanced?
3.  What is friction?

Newton's laws crash course
Friction always works against motion.

Friction depends on:
types of surfaces
how hard they are pushed together

1.  What is the distance covered in 10 minutes
by a car going 10km/hr?

2.  What is the acceleration of a car that started
at 100km/hr and got to 50km/hr in one hour?

3.  Draw a force diagram of a skydiver who is
falling at a constant speed with wind blowing to right.

Friction always works against motion.

Static - not moving
Fluid - gas or liquid friction
Rolling - wheels rolling friction

Friction turns motion into heat.
You have to subtract the amount of friction from net force.
Name a unit for:
distance =
speed =
acceleration =
force =

Gravity is balanced by the "normal" force.
All unbalanced forces cause a change in motion.
The normal force is provided by your chair,
the building, the crust, etc.
1.  What force is opposing gravity?
2.  What do we call the direction gravity moves things?
3.  Is the box accelerating? 1.  What two things does friction depend upon?
2.  How can you reduce the amount of friction
between sliding surfaces?
3.  What is the net force below?   The force of gravity depends on distance and mass.
Earth's acceleration due to gravity is 9.8m/s2
1.  Why do engines have oil?
2.  What do ball bearings do?
3.  What are shooting stars?
4.  Ignoring air resistance, how fast would something
be moving if falling at 1s?  2s?  3s?

Inertia is resistance to changes of motion.

Inertia is in the direction of motion.
Air resistance is friction with the air.
Air resistance depends on surface area and speed.
1.  How do parachutes work?
2.  Do you think going faster increases or decreases air resistance?
3.  What type of friction is air resistance?

Quiz Thursday:  acceleration, force, and terms.

Weight is the FORCE of gravity pulling on mass.
Always assume you are on Earth.
1. Draw a force diagram of a skydiver with balanced forces.
2. When are the forces balanced on a falling object?

3.  Why do things fall at different rates?

4.  Without air resistance,
what is the acceleration of ALL falling objects?

Newton's First Law of Motion:
An object keeps its motion unless acted on by an unbalanced force.

1.  What two factors determine the force of gravity?
2.  Are astronauts in space weightless?
3.  Are astronauts on the moon weightless?
4.  What do seatbelts do? Newton's second law of motion states:
force = mass X acceleration

The unit of weight in SI is the newton.
1 pound = 4.4 newtons
1 N = .22 pounds
1.  Calculate your weight in newtons, or use
2.  If a 10kg object is accelerating at 10m/s2,
what is the force placed on it?

Galileo is widely considered to be the first true
scientist and worked on motion before Newton.
Up and weight mean force against Earth's gravity.
Drop and fall are caused by gravity
1 N = 1 kgm/s2
1. What is the acceleration due to Earth's gravity?
2. Joe has a mass of 50kg, what is his weight?
3. What is the acceleration of a 5kg mass pushed with 10N?

Newton's Third Law states: for every action there is
an equal and opposite reaction.
Rockets work by pushing matter behind them,
which pushes the rocket forward.
Gravity subtracts from motion going up, adds when falling.
1. If a 100kg rocket has thrust of 1000N, what will be its
acceleration lifting straight up on Earth?
2. If the rocket gets turned around at the top of the
atmosphere, what will its acceleration be TOWARDS the Earth?

Freefall is when gravity is causing acceleration.
projectile is something that is thrown or projected.
Terminal velocity is reached when a falling
object no longer accelerates.

The force of air resistance is equal to the
weight of the object at terminal velocity.

1. What does air resistance depend on?
2.  Is gravity balanced or unbalanced as you are falling?
3.  What is inertia, and what does it depend on?
4.  If a 10kg rock is rolling with an acceleration of 2m/s2,
what was the force on the rock?

Freefallin

The normal force can ONLY balance gravity!
1. If a 100 kg person jumps out of a plane,
what force does she have while falling?
2. If a 80 kg person jumps out at the same time,
who will hit the ground first, assuming the same air resistance?
3. If you have a mass of 100 kg, what is your weight
on Mars? (A= 4m/s2)

1.  What can change motion?
2.  Does friction force oppose motion or help motion?
3.  How do you know if there are any unbalanced forces on an object?
4.  If there is 5N of friction, how much force do you need
to accelerate a 10kg rock with 2m/s2?

There is ALWAYS more force WITH friction than without!
Friction always works against motion.
Friction increases as speed increases.

1.  What force is needed to accelerate a 5kg rock with 10m/s2?
2.  Finish these sentences, use "acceleration":
The more force...
The more mass...
3.  If you push a 10 kg object with 50 N for 3 seconds
and it accelerated to 4 m/s2, how much friction is there?

1. If an object is 980N on Earth, what is it's weight?

2.  What is the force required to accelerate a 10kg object to 5m/s2?

3. If #2 took 55N how much friction was there?

4.  What is the acceleration of a 5kg ball that has 10N placed on it?

What is the shortest way you can summarize each of Newton's Laws?
Law 1:
Law 2:
Law 3:

1. If a 5kg block requires 20N of force to accelerate it to 3m/s2,
how much friction did it create?

Momentum and inertia are similar, but momentum is a calculation:
mass X velocity = momentum
Momentum is how much energy a moving object has.
1. If a 100kg meteor is moving at 50 m/s, what is the momentum?
2. What is the unit for momentum?

Momentum is conserved, that means the total amount
of momentum in a system stays the same except for outside forces.

1. What does the amount of momentum depend on?
2.  What does the amount of air resistance depend on?
3.  What is the momentum of a 5kg ball rolling at 5m/s?
4. If a car is moving at 5 m/s and has a momentum
of 10 kg m/s what is its mass?

INERTIA EU
 Speed Total resistance Required power 35 mph 374 N 6 kW = 8 hp 60 mph 558 N 15 kW = 20 hp 80 mph 775 N 28 kW = 38 hp 100 mph 1053 N 47 kW = 64 hp 120 mph 1393 N 75 kW = 102 hp 140 mph 1795 N 112 kW = 152 hp 160 mph 2259 N 162 kW = 220 hp 180 mph 2785 N 224 kW = 304 hp 200 mph 3372 N 301 kW = 409 hp 220 mph 4022 N 395 kW = 537 hp 250 mph 5112 N 571 kW = 776 hp

In a collision, the momentum is "conserved", it doesn't change.
The energy is transferred between the objects.

1.  If a 20kg ball going 10m/s rolled into another 20kg ball and stopped,
how fast would the second ball go?

http://glencoe.mheducation.com/sites/0078617707/student_view0/chapter1/section2/self-check_quiz-eng_.html#quest1

Isaac Newton discovered white light is made of all the colors, invented a new type of telescope, the three laws of motion, and invented calculus.

1.  If a 20 kg scooter at rest was jumped on by a 20 kg kid at 10 m/s,
how fast will both kid and scooter go?

2.  An 80 kg football player moving 6 m/s tackles and
collides with a stationary 140 kg football player.
What speed will both the football players have the moment after impact?

3.  What do air bags change that allows us to survive a crash?

4.  Why do race cars fly into many pieces in a collision?

You are at the front of a floating canoe, close to the shore.
You jump, expecting to land on the beach easily.
You land in the water jumping from a canoe to shore. Explain why.

1.  What is the momentum of a 1000kg boat if it's anchored?

2.  If the momentum is 25 kg m/s and the object went 50m
in 5 seconds, what is its weight on the moon? (A=1.6m/s2)

kid newton

newton 3rd

1.  If a 100kg car going 10 m/s accelerated to 30 m/s
in 2 seconds, what force is it under?

2.  If a 100 kg person jumps out of a plane, what force
does she have while falling if the air resistance is 20N,
it takes 5 seconds, and the plane has a mass of 1000kg?

Orbit means to be held by gravity and continue to move.
Copernicus proposed a sun-centered solar system.
Galileo also proposed a sun-centered solar system.

Exoplanets are planets that orbit around other stars.

We now know of over 3,000 exoplanets.

1.  Is the Earth accelerating?

2. If a car has an acceleration of 10m/s2 for 5 minutes, how far did it go?

1. If a 5 kg block requires 20 N of force to accelerate it with 3 m/s2, how much friction did it create?

2. If there is 10 N of friction on a 10 kg block, how much force is needed to accelerate it with 5 m/s2?
Great Video Tutor on Newton's Laws (Go to this if you need help!)

Quiz on Newton's Laws

Self Check Quiz

You need my approval before going to this site.
http://www.learner.org/interactives/parkphysics/coaster/

Then take self quiz on motion:

Then go here:

and fill this in:
Worksheet for Motion Si

We will be making a kahoot quiz.
DO NOT use the app!
Register, then with a partner make a new quiz with three questions.
Then share them with me and we will use your app to play.

Drug overdose is the number one cause of injury death in US,
more than car crashes in 2012.

1.  If an object weighs 100N on Earth, what is it's mass?

To convert simple units, multiply by a fraction with the units you want to get rid of opposite where they are.
The fraction needs to equal one.

http://www.physicsclassroom.com/mmedia/kinema/trip.cfm
http://www.physicsclassroom.com/mmedia/kinema/acceln.cfm
http://www.physicsclassroom.com/Class/1DKin/U1L2b.cfm
http://www.physicsclassroom.com/Class/1DKin/U1L3a.cfm

"The big increase in heroin-related deaths is directly tied
to the epidemic of narcotic pain-killer abuse."

"Twice as many people died from narcotic painkillers as heroin."

CDC
http://www.cdc.gov/homeandrecreationalsafety/overdose/facts.html

A force is a push or pull.
A force causes changes in movement.

http://www.rpdp.net/sciencetips_v3/P8B1.htm
http://www.zephyrus.co.uk/forcefacts.html (click more, bottom left)
http://www.ck12.org/user%3AZXJpbi5rLmJyYWJhbnRAYWRhbXMxMi5vcmc./book/Physical-Science-For-Middle-School/r2/section/13.1/

1.  If a force of 5N is moving right and runs into a 5N force moving left, what is the net force?

2.  If a 5N force is pushing in the same direction as a 10N force, what is the net force?

http://www.harcourtschool.com/activity/newton/
http://glencoe.mcgraw-hill.com/sites/0078617707/student_view0/chapter1/section2/self-check_quiz-eng_.html#quest1
http://www.dontstoplearning.com/ks3science/9Ka_Speed_Acceleration.htm

http://www.rpdp.net/sciencetips_v3/P8B1.htm
Basic:  click "More" bottom left
http://www.zephyrus.co.uk/forcefacts.html (click more, bottom left)

You need my approval before starting this game.
Click "run", use tabs in upper left for different games

F=MA 1.  How much force is needed to accelerate a 10kg wagon to 10m/s2?

2.  What is the mass of a bike that required 10N to accelerate it to 2 m/s2?

The unit of weight in SI is the newton.

1 pound = 4.4 newtons
1 N = .22 pounds
2. What is Newton's second law of motion?
3.If a 10 kg object has a 20 newton net force acting on it,
what is the acceleration?

3. If a 10kg object has 50N on it, what is the object's acceleration?
4.  Explain what happens if you let go of a full balloon of air and why.

Momentum and inertia are similar, but momentum is a calculation:

mass X velocity = momentum
Momentum is how much energy a moving object has.
1. If a 100kg meteor is moving at 50 m/s, what is the momentum?
2. What is the unit for momentum?
3. If an object is 20 kg and experiencing 20 m/s2 acceleration, what force is on it?
4.
If there is 10 N of friction on a 10 kg block, how much force is needed to accelerate it 5 m/s2?

Turn the sound down for this website
Isaac Newton Website

You need my approval before going to this site.

My Room Number
782403

You need my approval before going to this site.

3.  Why does a balloon fly around when it is blown up and let go?

What is Newton's third law of motion?

Chapter 2 test tomorrow, sections 1 through 4.

If a 50kg car going 20m/s accelerated to 30m/s in 2 seconds, what force is it under?
Galileo Webpage

Motion in 2D

Orbits

Collision Lab

Gravity and Distance

What is the formula for acceleration?

My Room Number
782403

Work = force X distance
The unit for work is the joule, which is one Newton meter.
The object must move for work to be done.

M

Special Writing Prompt: 1-30
What is gravity? What is Newton's first law in your own words?
What is the difference between mass and weight?

http://www.classzone.com/books/ml_science_share/vis_sim/mfm05_pg50_newton/mfm05_pg50_newton.html

_____________________________________________________________________________

Vocab directions:
Groups up to 4.
Everyone must fill in at least one block for each word.
Initial the block you do.
It is a group grade, so if something is wrong you must correct it before it is turned it.
Ten points for each correctly finished
Minus five points for each mistake.
The goal is three examples and three characteristics, do not use the same thing for both.
What do you think happens when 2 equal forces push
on the same object in opposite directions?

http://www.rpdp.net/sciencetips_v3/P8B1.htm
Basic, click "More" bottom left
http://www.zephyrus.co.uk/forcefacts.html (click more, bottom left)

http://www.ck12.org/user%3AZXJpbi5rLmJyYWJhbnRAYWRhbXMxMi5vcmc./book/Physical-Science-For-Middle-School/r2/section/13.1/

Click "run", use tabs in upper left for different games

http://www.harcourtschool.com/activity/newton/
http://glencoe.mcgraw-hill.com/sites/0078617707/student_view0/chapter1/section2/self-check_quiz-eng_.html#quest1
http://www.dontstoplearning.com/ks3science/9Ka_Speed_Acceleration.htm

What is gravity?
When is gravity a balanced force?
When is gravity an unbalanced force?

The amount of friction depends on two things.

• How hard surfaces are pushing
• Types of surfaces

The smoother the surfaces, the less friction.
What things do we use to increase friction?
What things decrease friction?

The four types of friction are:
static
sliding
rolling
fluid
Give several examples of each type.
Which type of friction is air resistance?
What is it called when the only forces acting on an object is gravity and air resistance?

Exit Slip: What are the four types of friction?
Do all the sites from Task C-13 before you do the below sites
http://www.engineeringinteract.org/resources/parkworldplot/flash/concepts/friction.htm
(turn down sound, click on "next")

http://www.fitnessforlife.org/middleschool/ms-chapter-3/topic-38-friction
(you may play the games after you read the page)
http://www.bbc.co.uk/bitesize/ks2/science/physical_processes/friction/play/

http://pbskids.org/sid/funwithfriction.html

http://www.physicsclassroom.com/mmedia/newtlaws/efff.cfm

Go try to build a coaster, turn friction all the way up! Does not always work, try from home!
http://www.funderstanding.com/coaster
http://www.learner.org/interactives/parkphysics/coaster/
http://www.glencoe.com/sec/science/cgi-bin/splitwindow.cgi?top=

http://dsc.discovery.com/games/coasters/interactive.html

Newton's first law of motion is also called the law of inertia.
1. What is inertia?
An object's motion stays the same unless a force changes it.
2. How is mass related to inertia?
Vocab ch2 due Thursday, today is the only time to work on it in class.

The unit of weight in SI is the newton.
1 pound = 4.4 newtons
1 N = .22 pounds
2. What is Newton's second law of motion? Force = mass X acceleration
3.If a 10 kg object has a 20 newton net force acting on it, what is the acceleration? You are an astronaut fixing the outside space station and your tether (rope) breaks, causing you to drift away.
How can you return to the station? You do NOT have a jet pack!

You must look at all the pages on Newton, take quiz, write answers with numbers in your notebook
Use Safari to access the websites below.
http://teachertech.rice.edu/Participants/louviere/Newton/

file:/Volumes/Teacher%20Handouts/MS%20Devlin/ch_2_-_forces_online.htm

Newton's Third Law states: for every action there is an equal and opposite reaction.
Rockets work by exhaust matter behind them, pushing the rocket forward.

1. If an object is 20 kg and experiencing 40 m/s2 acceleration, what force is on it?
2. If an object has 40 N on it and has an acceleration of 10 m/s2, what is its mass?
3. If a 10 kg object has 50 N on it, what is the object's acceleration?

Quiz on Ch2 Friday, 2-22

http://www.physicsclassroom.com/Class/newtlaws/

http://www.rpdp.net/sciencetips_v3/P8B1.htm

file:/Volumes/Teacher%20Handouts/MS%20Devlin/ch_2_-_forces_online.htm
Exit Slip: What are the four types of friction?

Speed = acceleration X time

1. If a car is traveling at 30 km/hour for 15 minutes, how far did it travel?
2. If a car is moving at 5 m/s and has a momentum of 10 kg m/s what is its mass?
3. If a car has an acceleration of 10m/s2 for 5 minutes, how far did it go?
4. Convert 7200 km/hour to km/s.

Exit slip: How does friction affect an object's motion?

1. What does the amount of inertia depend on?
2. What units is friction measured in?
3. If an object weighs 100 N on Earth, what is it's mass?

1. If an object weighs 100 N on Earth, what is it's mass?

Chapter test tomorrow
1. If a 100 kg person jumps out of a plane, what force does she have while falling?
2. If a 80 kg person jumps out at the same time, who will hit the ground first, assuming the same air resistance?
3. If you have a mass of 100 kg on Earth, what is your mass on Mars? (A= 4m/s2)

Answer the questions on page 70, numbers 11-to 16 on a separate sheet of paper in full sentences.You will have about ten minutes to get this completed.

There will be a quiz Tuesday, Feb. 28, on Newton's Laws, friction, force and motion.
If a 100kg car going 10 m/s accelerated to 30 m/s in 2 seconds, what force is it under?

If an object weighs 100 N on Earth, what is it's mass?
Hint - What causes weight?
Is weight a force?
What is the acceleration due to Earth's gravity?

Open Finder, Go to: Kessel, Teacher Handouts, MS Devlin, Ch2 Forces online.

Fill in Name, ID is Period. Make sure to click "Grade and submit" Show me the next screen!__

file:/Volumes/Teacher%20Handouts/MS%20Devlin/ch_2_-_forces_online.htm

F=MA worksheets will be collected Tuesday, March 6.
If a 100 kg rocket has thrust of 1000 N, what will its acceleration be lifting straight up on Earth?
If the rocket gets turned around at the top of the atmosphere, what will its acceleration be TOWARDS the Earth?

Chapter 2 test Thursday, 3-8-12.
Test corrections for ch1 due Thursday.
Key Terms, page 68, due Thursday.
You may work in groups of three, but each must work on all the words.

Is weight a force?
If you have a mass of 100 kg on Earth, what is your mass on Mars? (A= 4m/s2)
What is your mass? (2.2lb = 1 kg)

All work must be in before the test tomorrow.
If you push a 10 kg object with 50 N and it accelerated to 4 m/s2, how much friction is there?
You do not have to do section 5 Key Terms.
Momentum is mass times velocity.
What is the momentum of the object above after 10 seconds?
What does prevail mean?

http://teachertech.rice.edu/Participants/louviere/Newton/

.

All around physics website:
http://www.physicsclassroom.com/Class/