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
Dynamic Equilibrium
If it is at rest.
 What does this mean?
o Zero velocity
o Zero acceleration
If it is moving in a
STRAIGHT LINE at a
CONSTANT SPEED.
 What does this mean?
o Constant velocity
o Zero acceleration
REMEMBER
 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.
2.
3.
4.
5.
S.E.
D.E.
M.E, but not enough info to say if it’s
S.E. or D.E.
None of the above - not in
equilibrium at all!
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
Dynamic Equilibrium
If it is at rest.
 What does this mean?
o Zero velocity
o Zero acceleration
If it is moving in a
STRAIGHT LINE at a
CONSTANT SPEED.
 What does this mean?
o Constant velocity
o Zero acceleration
2.1 Force
Net Force
The net force depends on
the magnitudes and
directions of the applied
forces.
2.1 Force
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
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
2.1 Force
Net Force
The net force depends on
the magnitudes and
directions of the applied
forces.
2.1 Force
Net Force
The net force depends on
the magnitudes and
directions of the applied
forces.
2.1 Force
Net Force
The net force depends on
the magnitudes and
directions of the applied
forces.
What can you conclude
MUST BE TRUE about
this box? It’s in….
1.
2.
3.
4.
5.
S.E.
D.E.
M.E, but not enough info to say if it’s
S.E. or D.E.
None of the above - not in
equilibrium at all!
Not sure
What can you conclude
MUST BE TRUE about
this box? It’s in….
1.
2.
3.
4.
5.
S.E.
D.E.
M.E, but not enough info to say if it’s
S.E. or D.E.
None of the above - not in
equilibrium at all!
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
Dynamic Equilibrium
If it is at rest.
 What does this mean?
o Zero velocity
o Zero acceleration
If 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? Greece
 WHEN? 4thCentury B.C.
 WHAT? Natural motion vs.
violent motion; objects belong
at rest unless experiencing a
push or pull, or returning to
rest

Questions…
a through d
 Any questions about the HW (#1-8)?

WHO? Copernicus
WHERE? Poland
 WHEN? 1473-1543
 WHAT? Earth and other
planets move around the sun;
his ideas were so controversial
that people persecuted him (De
Revolutionibus)

Questions…
e
 Any questions about the HW (#9-13)?

WHO? Galileo Galilei
WHERE? Italy
WHEN? 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
Close-up view of Galileo’s Inclined
Plane Bells
Galileo’s Original Telescope
Questions…

Any questions about the HW (#14-16)?
WHO? Sir Isaac Newton
WHERE? England
WHEN? December 25, 1642
- March 20, 1727
WHAT?
3 LAWS OF MOTION!
AND Law of Universal
Gravitation
Newton’s Cradle (1600’s)
Questions…
f
 Any questions about Newton?
 http://www.youtube.com/watch?v=VupFD
DrX0Rw#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
Is this a mass, weight, or volume?
Mass Weight Volume T Chart
2000 lb race
car
2kg Discus
500ml Beaker
What’s the BIG idea?

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?
POGIL- Moving Objects
Work in groups of 4-5
 You 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 do we know?? (Look at Page 3)
What’s the BIG idea?
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?

Does location affect my weight?
EXIT SLIP
On a loose-leaf/scrap piece of paper,
answer the following questions and place it
in the inbox on your way out
1)
2)
3)
TONIGHT’S HOMEWORK
From the front of the classroom, please
pick up Weight v. Mass Homework.
 There are dimensional analysis problems,
you can do them! Look at the conversion
sheet given on the first page.
