Daily Agenda for November 13th and 14th
DO NOW: • With your partner, review Net Force
Homework. Discuss your answers and how you arrived at your solutions.
Homework due (Place in the Inbox please!)• Video Analysis (assignment from last
week)Tonight’s Homework:• Read and Study Chapter 4• Complete, check, & correct #1-7 on your
POGIL (you’ll get this later in class today)
Mechanical Equilibrium ( ME) Is when…
The object is not changing its state of motion… so the object is not accelerating… and the net force on an object is zero.
And there are 2 types of it…Static Equilibrium
If it is at rest. What does this mean?
o Zero velocityo Zero acceleration
Dynamic EquilibriumIf it is moving in a STRAIGHT LINE at a CONSTANT SPEED. What does this mean?
o Constant velocity o Zero acceleration
REMEMBER
MechanicalStatic
Dynamic
It’s in Mech. Eq!Think back to our Do Now!Weight/gravitySupport forceThey are FORCES but they CANCEL OUT. (SE)Or….something could be MOVING at a constant velocity. Weight and support cancel; push and friction cancel (DE)
What is “N”?◦A “Newton”◦Named after Sir Isaac Newton
◦It is a UNIT of force that we will learn more about NEXT class…
What can you conclude MUST BE TRUE about Box 3? It’s in….
1. S.E.2. D.E.3. M.E, but not enough info to
say if it’s S.E. or D.E.4. None of the above - not in
equilibrium at all!5. Not sure
Mechanical Equilibrium ( ME) Is when…
The object is not changing its state of motion… so the object is not accelerating… and the net force on an object is zero.
And there are 2 types of it…Static Equilibrium
If it is at rest. What does this mean?
o Zero velocityo Zero acceleration
Dynamic EquilibriumIf it is moving in a STRAIGHT LINE at a CONSTANT SPEED. What does this mean?
o Constant velocity o Zero acceleration
Net Force
The net force depends on the magnitudes and directions of the applied forces.
1 person pushing with 5N + 1 person pushing with 10 N is equal to 1 person pushing with 15 N
2.1 Force
Net Force
2.1 Force
The net force depends on the magnitudes and directions of the applied forces.
1 person pushing with 5N + 1 person pulling with 10 N is equal to 1 person pulling with 10 N
What can you conclude MUST BE TRUE about this box? It’s in….
1. S.E.2. D.E.3. M.E, but not enough info to
say if it’s S.E. or D.E.4. None of the above - not in
equilibrium at all!5. Not sure
What can you conclude MUST BE TRUE about this box? It’s in….
1. S.E.2. D.E.3. M.E, but not enough info to
say if it’s S.E. or D.E.4. None of the above - not in
equilibrium at all!5. Not sure
Mechanical Equilibrium ( ME) Is when…
The object is not changing its state of motion… so the object is not accelerating… and the net force on an object is zero.
And there are 2 types of it…Static Equilibrium
If it is at rest. What does this mean?
o Zero velocityo Zero acceleration
Dynamic EquilibriumIf it is moving in a STRAIGHT LINE at a CONSTANT SPEED. What does this mean?
o Constant velocity o Zero acceleration
Take out Exit Slip Newton’s First Law!
• For the next 3-5 minutes, discuss your responses with your partner/surrounding group. Make corrections!
CHAPTER 4: Newton’s first law of Motion…inertia**DISCLAIMER** The information you are about to see does not represent the views, beliefs, or scientific facts held to be true by your teachers and the scientific community. Please remember that the views expressed are those of really old, REALLY dead scientists who made amazing contributions but weren’t always correct.
WHO? Aristotle(Aριστοτέλης)
WHERE? GreeceWHEN? 4thCentury
B.C.WHAT? Natural
motion vs. violent motion; objects belong at rest unless experiencing a push or pull, or returning to rest
WHO? Copernicus
WHERE? PolandWHEN? 1473-1543WHAT? Earth and other
planets move around the sun; his ideas were so controversial that people persecuted him (De Revolutionibus)
WHO? Galileo GalileiWHERE? ItalyWHEN? Late Renaissance (1564-1642)WHAT? Need a force to KEEP an object moving ONLY if there is friction; objects resist change to states of motion (inertia); concerned with HOW not WHY things move
WHO? Sir Isaac Newton WHERE? EnglandWHEN? December 25, 1642 - March 20, 1727WHAT?
3 LAWS OF MOTION!AND Law of Universal Gravitation
Questions…fAny questions about Newton?http://www.youtube.com/watch?v
=VupFDDrX0Rw#t=226
TASKS:CHECK and CORRECT your
tests!You WILL see these questions
again.If you don’t understand WHY an
answer is what it is…ASK!Answers mean NOTHING if you
don’t know how to get to them!
TASKS:HW - #1-7 on POGIL
(check/correct online)
EXIT SLIPS: In IN BOX
TESTS: Give to Mrs. Correia on way out the door
Early Astronomers: Give to Mr. O’Connor on the way out the door
Mass Weight Volume T Chart
2000 lb race car
In each column, provide an example of Weight, Mass, and Volume
2kg Discus 500ml Beaker
USE CORRECT UNITS!Remember Metric
Patrol!
What is the difference between Mass, Weight, and Volume?
If I stood on a regular bathroom scale in outer space, what would it read?
Does location affect my weight?
What’s the BIG idea?
POGIL- Moving ObjectsWork in groups of 4-5You may work at a lab bench, but
make sure you are able to see the projector
Work efficiently on these problems! Whatever is not finished becomes homework!
At each check in with a teacher. DO NOT GO AHEAD UNTIL YOU HAVE DONE SO.
What is the difference between Mass, Weight, and Volume?
Mass: Quantity of how much matter is in an object. Units: g, kg, mg, etc.
Weight: Measurement of force of gravity acting on an object. Units: pounds (lbs) Newtons (N)
Volume: How much space an object takes up. Units: cubic cm, Liters (L), cubic meters
What’s the BIG idea?
If I stood on a regular bathroom scale in outer space (aka weightless environment), what would the scale read?
What’s the BIG idea?
ZERO!
Weightlessness= Zero Gravity
EXIT SLIP
On a loose-leaf/scrap piece of paper, answer the following questions and place it in the inbox on your way out1)
2)
3)
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