A car is on a flat raft floating in a
lake. Suddenly, someone starts to drive the car forward.
What happens?
Today:
Check and Review Homework.
Finish cars.
Road test next class.
Begin Mousetrap Car Activity 1
Homework:
Get your car ready. Cars should be complete before next class.
Absent Students:
Answer the warm-up question, above, on paper.
Spend 50 minutes working on your mouse trap car. Provide
proof that you worked on your car.
Class #4
Monday,
11/15
Warm-Up:
If you jump out of an airplane and fall
to the ground, when are the forces on your body balanced? When are
they unbalanced?
Today:
Quiz
Finish Cars
If there's time, begin the following... Estimate your car's
maximum velocity. Determine the net force acting on your car
during acceleration. Determine the force of your car's friction.
Determine the force of your car's "motor."
Watch the "Newton's Laws Quiz Review" on
School Tube,
Complete today's homework assignment (above).
Meet Mr. Stapleton outside of normal class time to provide proof
of completion of #2-5.
Class #2
Tuesday,
11/9
Warm-Up:
Is it better for a mouse trap car to
have:
taller wheels or shorter wheels?
a longer body or a shorter body?
a longer arm or a shorter arm?
Today:
1. New attendance policy:
Work for each day (including homework assigned that day) will
be worth 2.5% of your quarter grade. You can only receive
all of this 2.5% if you are here and if you do the class work
and homework satisfactorily -- or you make up the class
as described below. In other words, you earn full credit by
doing all of the following three things: 1) being here,
2) completing classwork in a satisfactory manner, 3) completing
homework in a satisfactory manner.
To make up a missed class, first check the "absent
students" information for the day you missed (see example below).
Then complete the required assignments and provide proof of
completion (possibly a signature of a trustworthy adult).
Present this proof of completion to Mr. Stapleton outside of
class time (call back, 4th block, or before school).
2. Review the homework from last class.
Homework:Answer these questions on
your own paper. For each problem, you must draw a labeled diagram.
A child pushes a 20kg sled. In the beginning, the sled is
sitting still. The child pushes the sled with a constant
acceleration for 6 seconds. In that time, the sled travels
16m. Give the sled's average velocity, final velocity, and
acceleration. Also give the net force that was applied to the
sled.
After the child stopped pushing, the sled began to slow down.
It eventually stopped. This slowing down period lasted 15
seconds, and during that time the sled traveled 30m. For this
slowing down period, give the sled's average velocity, starting
velocity, and acceleration. Also give the force of friction
that was acting on the sled.
Bonus (not required): The force you gave in #1 was the net force on the
sled. How much force did the child actually apply to the sled?
Absent Students:
Turn-in your homework from last class (see below).
Answer the warm-up question, above, on paper.
Spend 1 hour building a mouse trap powered car (at home or in
E205, outside of normal class time).
Complete today's homework assignment (above).
Meet Mr. Stapleton outside of normal class time to provide proof
of completion of #2-4.
Friday,
11/5
Warm-Up:
On Earth, if you want to
know something's mass, in kilograms, you weigh it.
Why won't this work in space?
Suppose you are in space, and you have two items
with the same volumes but different masses. What can you do to
figure out which one has more mass?
One definition of mass is "the amount of stuff in
an object." The video that we watched defined mass as a
measure of something's ____________.
Today:
Practice with net force on a falling coffee filter.
Complete practice questions on p.
20-21. #1-5, 8, 9, 15-20. [13 questions in all].
Begin building cars.
New attendance strategy Monday
Online Homework:Answer the following
questions on paper, and bring them with you to next class.
Go back to the first passage (from #1), and answer questions
1-7, at the bottom of the page.
Wednesday,
11/3
Warm-Up:
1. You're standing
in the middle of a completely frictionless frozen lake. There is
no air around you, and you are beginning to suffocate. You see an
oxygen tank several meters away. Right next to you are a small
battery powered fan and a heavy bowling ball. What should you do
in order to save your life?
2. If someone is pushing you to the left with a
force of 3N, and somebody else is pushing you to the right with a force
of 5N, what is the "net force" on your body?
Today:
New attendance policy is on its way.
Finish Fan Cart Force Activity -- Review a few papers with the
ELMO.
Begin designing mousetrap-powered cars. Decide who you
will work with, and who will bring what. What are the most
important factors? Does neatness matter? **Turn in group
names and a list of possible supplies for: wheels, axles, body.
Homework:
Create mousetrap car designs: two drawings from different
perspectives, required materials.
????
Monday,
11/1
Warm-Up:
Explain how this mousetrap-powered car works.
Today:
Return Tests
Block 1: drop an assignment?
Newton's 1st and 2nd Laws.
Homework:
?
Thursday,
10/28
Warm-Up:
Newton's 1st Law states:
Objects in motion remain in motionin a straight line and
at a constant
speed, and objects at rest stay at rest -- unless acted on by an
unbalanced force.
So, which of the following are being acted on by an unbalanced force?
a car that is accelerating at a rate of 4m/s^{2}
a car that is driving down a straight highway at a constant
speed of 30m/s
a cannonball that is flying through the air
a tree stump that is just sitting there
a race car that is driving on a circular track at a constant
speed of 100m/s
A ball is thrown directly
upward with an initial velocity of 30m/s. How high does the ball
go before it falls back down?
Today:
Return Tests
Grade reports. Drop one low grade (not a test or quiz).
Another practice test
Homework:
STUDY. TEST NEXT CLASS> If your score was below 70% (35/50), you must retake your test
on Thursday. If your score is still below 70%, you may have to
come to call back.
Wednesday,
10/19
Warm-Up:
Look at the clamp hanging from the
string. Soon, the bottom string will be pulled downward until one
of the strings breaks. Which string do you think will break first?
Why?
Today:
Test
Finish Mythbusters Episode
Homework:
Monday,
10/18
Warm-Up:
A pen is balanced on end, on a piece of
paper. Can you pull out the paper without causing the pen to fall?
Why or why not?
1. You throw a ball directly
upward. Its initial velocity is 60m/s.
How many seconds will it take the ball to reach
its high point?
What average velocity will it have on its way up?
How high will the ball go?
2. If you drop a ball from a tall building, how far
will it fall in 4 seconds?
Today:
Return quizzes.
Work on Test Review. Review must be complete by _______.
Homework:
Study for test. Test day to be determined next week -- either
Wednesday or Friday.
Tuesday,
10/12
Warm-Up:
1. You throw a ball directly
upward. Its initial velocity is 30m/s.
How many seconds will it take the ball to reach
its high point?
What average velocity will it have on its way up?
How high will the ball go?
2. If you drop a ball from a tall building, how far
will it fall in 6 seconds?
Today:
Pizza for winners. Extra credit for places 1-6.
Add other group members' names to list.
Quiz
Work on test review.
Rank
(based on height + time X 7)
Names:
Max
Height (m)
Time aloft
Block
1
Bryan et al.
113
9.05
W2
2
c3
76
8.36
W1
3
Danie et al.
76
7.63
W2
5
Riziki et al.
74
7.59
w3
4
Kyle et al.
72
8
w3
6
Nicole B et al.
70
7.64
W1
Homework:
Begin test review. There will also be work time next class.
Friday,
10/8
Warm-Up: If all of the angles (a-d) are 45 degrees,
and the white line is 141m long, how high is the rocket?
Today:
Rocket height contest. Collect data for height measurements.
Homework:
Study for Quiz 3 (on Tuesday). Quiz 3
will cover problems like #13 on p. 16, and problems like the
warm-up, below. You may have to estimate time and distance
while observing an event.
Wednesday,
10/6
Warm-Up:
You roll a car down a
school hallway. The car rolls for 20 meters and then comes to a
stop. It takes the car 5 seconds to travel those 20m. During
that 5 seconds, the car has a constant deceleration.
***Hint: This is the opposite of the problems
that we've been doing.***
What was the car's final velocity?
What was the car's average velocity?
What was the car's initial velocity (just after
it left your hand).
What was the car's acceleration?
Today:
Return Papers
Review Homework ("extra practice")
Work time. Finish rockets.
Homework:
You must have a rocket to fly on Friday.
Study for quiz 3 -- will be given next Tuesday. Quiz 3
will cover problems like #13 on p. 16, and problems like the
warm-up, above. You may have to estimate time and distance
while observing an event.
Monday,
10/4
Warm-Up:
A race car sits at the
starting line. It accelerates for 4 seconds. At the end of
those 4 seconds, it has traveled 64 meters.
What is the car's average velocity?
What is its beginning velocity?
What is its final velocity (at the 64 meter mark)?
What is the car's acceleration?
Today:
See grades -- sorry, Mr. Stapleton left the papers at home. :-(
Check Homework (#13)
Work Time: Rebuild Rockets, Finish Graphs, Homework, Missing
Assignments.
Homework:
If your quiz score was below 80%, complete the extra practice
sheet for homework.
Next rocket flight on Friday.
Thursday,
10/1
Warm-Up:
Shirley was standing at a
starting line. Now she begins sprinting away. After 3
seconds she has traveled 12m. Assuming that her acceleration is
constant (the same for the whole 12 meters)...
What is her average velocity?
What is her beginning velocity?
What is her final velocity?
What is her acceleration?
Today:
Quiz
Another way to calculate acceleration.
Rebuild Rockets
Homework:
Complete question #13, on p.16 of
handout.
Tuesday,
9/28
Warm-Up:
Pierre is driving his car
at a velocity of 90m/s. Pierre speeds up to pass another car.
After accelerating for 3 seconds, Pierre is traveling 99m/s. What
was Pierre's acceleration?
Graphing Velocity and Acceleration on Computers.
Click here for directions.
Save files to your folder. Print both graphs, staple, and
turn-in to Mr. Stapleton.
Homework:
Study for quiz next class. Quiz
questions will be like the questions on the last homework (p.12
#4-6, and p.14-16 #1-12).
Friday,
9/24
Warm-Up:
How much water do you think you should
put in your rocket? Why?
Announcements:
missing calculator
what to do if you turn in a paper late, and it's be cause you
were absent
Today:
Turn-in homework (questions on p.12, 14, 15, and 16)
30 minutes of rocket work time. Before launch, 1) measure
and record rocket height in cm, 2) make a "launch card"
--8.5"x11", with group members' names and rocket height in large,
bold print, 3) add water to rocket -- whatever amount you
choose, 4) gather materials for rocket repair/modification out on
the field.
Launch Rockets -- keep the field neat; be safe
Help clean up. Help put equipment away, clean up duct tape
and scattered rocket parts, etc. Leave the classroom as neat
as you found it.
Homework:
None -- If you want, you can look on the M:drive for
photos of your rocket. Look in M:drive
→ Stapleton → Read Only → Physics →
[your class' folder]. The pictures will probably be photos
that were taken 1/60 second (0.01666667s) apart. Here's the
spreadsheet we will use in the computer lab.
Wednesday,
9/22
Warm-Up:
1. Estimate the blue car's
speed, in m/s and mph. You can use a calculator, but not a timer
or length measuring tool.
2. The science office is on the third floor...
How many meters do you think it is from the window sill to the
ground?
If we dropped a big rock from the window, how long do you think
it would take the rock to fall to the ground?
How fast would the rock be traveling when it hit the ground?
Be prepared for rocket launch on Friday -- dependent on weather.
If the weather looks nasty, we will launch on Tuesday.
p. 12, # 4-6. p. 14-16, #1-12. (15 questions
in all)
Monday,
9/20
Warm-Up:
What would happen if you made a hole
through the center of the Earth, and you jumped in? If you came
out the other side, where would you be? (antipodes
map)
Suppose you're using the velocity
formula to find the velocity of a dog. It takes the dog 80 seconds
to run 20 meters.
What is the formula for velocity?
What number would you insert for "t" in the velocity formula?
What number would you insert for "d" in the velocity formula?
What is the dog's velocity?
Today:
Return and Review Quizzes
Finish/Turn-in/Review Acceleration Lab (p. 9-10)
Begin designing water rockets.
Units for Acceleration and How to Calculate Acceleration.
Handout 4.
Interesting Info:
Homework:
** Bring in at least one clean 2-liter bottle by Monday
(9/20). Remove the label and write your name on the bottle
with permanent marker. Keep the cap on the bottle.
Tuesday,
9/14
Warm-Up:
Today:
Review and return practice quiz.
Velocity and measurement quiz.
Actual answers to Velocity lab -- turn in velocity lab (p.7)
** Bring in at least one clean 2-liter bottle by Next Monday
(9/20). Remove the label and write your name on the bottle
with permanent marker. Keep the cap on the bottle.
Thursday,
9/9
Warm-Up:
Records of 132 cats that jumped from windows of buildings showed a
90% survival rate.The average
drop was 5.5 floors.
Injuries increased with increasing heights up to 7 floors.
When cats fell from over 7 floors, they actually suffered from
“less injuries.”
Why do injuries increase
from floors 1-6? Why would injuries decrease at over 7
floors?
**Quiz next class. Be able to answer questions like those
on p.8. You must also be able to measure the length of a line
and express that length in cm and m.