Transcript 13.10.14APWeek102DKinematics

AP Physics
Monday 13.10.14
Standards:
2c2 Students should
understand the motion of
projectiles in a uniform
gravitational field.
Objective: SWBAT
solve 2D Kinematics
AP Problems
Agenda
1. Warm Up
2. Review HW
3. Mythbusters: bullet fired
4. Solve AP Problems
A
B
C
D
Warm Up
32. A ball is thrown and
follows a parabolic path, as
shown above. Air friction is
negligible. Point Q is the
highest point on the path.
Which of the following best
indicates the direction of the
acceleration, if any, of the ball
at point Q?
E. No Acceleration
Homework
Finish AP Problems
AP Physics
Tuesday 13.10.15
Standards: 2c2 Students
should understand the
motion of projectiles in a
uniform gravitational field.
Objective: SWBAT solve
problems involving
relative velocity.
Agenda
1. Warm Up
2. Review AP Problems
3. AP WORKSHOP THIS
WEEKEND
4. 2 More Word Problems
Warm Up
A target T lies flat on the ground 3 m
from the side of a building that is 10m
tall, as shown above. A student rolls a
ball off the horizontal roof of the building
in the direction of the target. Air
resistance is negligible. the horizontal
speed with which the ball must leave the
roof if it is to strike the target is most
nearly?
3 m
a.
10 s
m
b. 2
s
c.
3 m
2 s
d)3m / s
Homework
2D Kinematics HW
e)10
5m
3 s
AP Physics
Wednesday 13.10.16
Warm Up
143. The free fall trajectory of an object thrown
horizontally from the top of a building is shown
Standards: 2c1 Students should
as the dashed line in the figure. Which sets of
understand the motion of projectiles in a arrows best correspond to the directions of the
velocity and of the acceleration for the object
uniform gravitational field.
at the point labeled P on the trajectory?
Objective: SWBAT use their knowledge
of projectile motion to crack an egg.
Agenda
1. Warm Up
2. Relative Motion: Objects in Wind &
Water
3. Relative Motion Example
Homework
Relative Velocity 1-4 p.29
Warm Up
AP Physics
A flare is dropped from a plane flying over
level ground at a velocity of 70 m/s in the
Thursday 13.10.17
horizontal direction. At the instant the
Standards: Students should
flare is released, the plane begins to
understand the motion of projectiles in a accelerate horizontally at 0.75 m/s2. The
uniform gravitational field.
flare takes 4.0s to reach the ground.
CCS.ELA-Literacy.RST11-12.10 By the end of grade 12, read
Assume air resistance is negligible.
and comprehend science/technical texts in the grades 11Relative to a spot directly under the flare
CCR text complexity band independently and proficiently
at release, the flare lands.
Objective: SWBAT solve projectile
A) directly on the spot. B) 6.0 m in front
motion problems based on an object
of the spot C) 274 m in front of the spot
falling from a high place.
D) 280 m in front of the spot E) 286 m in
front of the spot
Agenda
1. Warm Up
2. Review HW
3. Crack the Egg Lab
Homework
Lab Write Due Next Tuesday
Projectiles Quiz Tomorrow
1 AP free Response Question
15 minutes using AP scaling
AP Physics
Friday 13.10.18
Standards: Students should
understand the motion of projectiles
in a uniform gravitational field.
Objective: SWBAT score 80% on the
quiz
Agenda
1. Warm Up
2. Quiz 5
3. Relative Motion
Warm Up
47. A whiffle ball is tossed straight up, reaches a
highest point, and falls back down. Air
resistance is not negligible. Which of the
following statements is true?
I.
II.
The ball’s speed is zero at the highest point.
The ball’s acceleration is zero at the highest
point.
III. The ball takes a longer time to travel up to
the highest point than to fall back down.
A) 1 only B) II only C) I&II D) 1&III E) I,II,&III
Homework
Test Review Monday
Test Wednesday
Relative Motion p.29 #2-5
Break the Egg Lab Activity
Objective: Break the egg with the marble on the first try by
rolling it off a table and through 3 rings. Take as many practice
runs as you want, but you only get one shot once you want to
break the egg. (If you do this you get five bonus points to your
lab write up.)
How to complete the lab write Up
1.
2.
3.
4.
Come up with a question or hypothesis that you think you can prove. : ex.
hyp. The 3 equations of motion will predict the motion of a following marble
enabling us to break an egg.
Write down materials & procedures used and write down your procedure for
setting up the experiment and implementing the experiment. (Do not include
anything about calculations in this section)
Data: Use the scant information that you have to make a parabolic graph that
represents the position of the marble. We do not have time data so we will
just graph vertical and horizontal position y vs. x
Questions you will need to answer in your Calculations portion of the lab:
- 1. What was the projectile’s initial velocity?
- 2. How long was the projectile in the air before it hit the egg?
- 3. Find the components of velocity of the marble as it goes through each of the
three rings and as it hits the egg
- 4. What was the projectile’s final speed and angle as it hits the egg?
5.
6.
Analysis: In this section just justify your results using data. This entails
evaluating your hypothesis as true, false, or inconclusive and provide it with
actual data. One thing you might try proving is that the motion is parabolic. It
may help depending on whether you are arguing for true, false, or
inconclusive.
Conclusion: Summarize your results: Include important data that you got
from the lab. Talk about and name some sources of error. Talk about and
name any design changes or improvements you’d make to the lab.
New Lab Write Up Format
Section
4
3
2
1
Question/Hypothesis
The central question the lab is
asking is stated along with a
plausible hypothesis
The central question is stated
and something resembling a
hypothesis is stated
Only the central question is
stated
The section is missing or
contains the wrong central
question.
Materials/Procedures
The procedures are written
step by step in complete
sentences and the materials
are clearly listed.
The procedures and materials
are listed but unorganized. The
procedure does not explain the
lab
Either the procedures or the
materials are incomplete.
Only procedures are present,
or only materials are present.
Data Collection
The lab contains a table and a
graph that represents the data
accurately and is labeled
correctly with the equation of
the line written.
The lab contains a table and a
graph but it may be missing
some labels and the graph may
not be done correctly.
The lab is missing a graph
completely.
The data is incomplete.
Calculations
Students have all calculations
completed, with work shown,
and they are correct.
Students have all calculations
completed and at least half are
done correctly and all work is
shown.
Students do not have all
calculations completed, and
little work is shown.
Calculations section is mostly
or entirely missing.
Analysis
The student gives evidence
from their lab data why their
hypothesis is true, false, or
inconclusive. The discuss the
relationships between the
variables that were graphed
and if linear they write down
the equation of the line.
The students gives evidence
from their lab data and
attempts to prove that the
hypothesis is false, true or
inconclusive, but the data is
misapplied and doesn’t support
their claim. For linear graphs,
no equation is given.
This section discusses whether
the hypothesis is true,
inconclusive, or false but no
data is used to support the
hypothesis and any reference
to the graph or the data is too
general to be helpful.
This section is omitted or the
student may mention the
hypothesis and its validity, but
doesn’t explain or the
explanation is not plausible
Conclusion
The conclusion includes a
summary of your lab results,
(which will include numbers or
equations), gives %error and
discusses sources of error. It
also gives a suggestion about
how to improve the lab.
The conclusion includes a
summary of your lab results. It
includes data. % error is given.
Either and least 1 source of
error discussed or a suggestion
is given to improve the lab.
The conclusion includes a
summary and either % error, or
mentions types of error, or
mentions improving the
experiment.
The conclusion is omitted or
only includes a brief summary.