14.12.01APWeek16

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Warm Up
AP PHYSICS
MONDAY 14.12.01
STANDARDS:
Standards: 3a3 A force exerted on an object is always
due to the interaction of that object with another object
I –Independent Resilient Individuals
RST.11-12.9 Synthesize information from a range of
sources into coherent understanding of a process,
phenomenon, or concept,…
Assuming Friction is negligible,
what is the Force F?
F
2N
1kg
3kg
(Remember, start with FBD.
Learning Goal: SWBAT solve MC
problems in preparation for their test.
Agenda:
1. Warm Up
2.
Continue Solving AP Multiple Choice Problems
3.
MC Test Tomorrow
Homework
MC Test Tuesday
AP PHYSICS
TUESDAY 14.12.02
STANDARDS:
Standards: 3a3 A force exerted on an object is always
due to the interaction of that object with another object
Warm Up
Find the normal force exerted on the
block by the surface if the block (with
a weight of W) is being pulled with a
constant speed.
F
θ
I –Independent Resilient Individuals
RST.11-12.9 Synthesize information from a range of
sources into coherent understanding of a process,
phenomenon, or concept,…
Learning Goal: SWBAT score 3,4,or 5 on
their MC exam
W
v
Agenda:
1. Warm Up
2. Forces MC Test
Homework
Work on Notebook
AP PHYSICS
WEDNESDAY 14.12.03
STANDARDS: 3A3 A FORCE EXERTED ON AN OBJECT
IS ALWAYS DUE TO THE INTERACTION OF THAT
OBJECT WITH ANOTHER OBJECT
Warm Up
What could you have had
more practice on that
would have improved your
test performance?
I –INDEPENDENT RESILIENT INDIVIDUALS
RST.11-12.9 SYNTHESIZE INFORMATION FROM A
RANGE OF SOURCES INTO COHERENT
UNDERSTANDING OF A PROCESS, PHENOMENON, OR
CONCEPT,…
60°
WHST.11-12.7: RESEARCH TO AID IN PROBLEM SOLVING
Learning Goal: SWBAT correct their test mistakes
Agenda:
1. Warm Up
2. Review Test
Homework
Correct Test Mistakes FAP#15
AP PHYSICS
THURSDAY 14.12.04
I- INDEPENDENT, RESILIENT IND.
STANDARDS:
F3A! DESCRIBING FORCES WITH VELOCITY,
ACCELERATION, ETC.
RST.11-12.9 SYNTHESIZE INFORMATION FROM A
RANGE OF SOURCES INTO COHERENT
UNDERSTANDING OF A PROCESS, PHENOMENON, OR
CONCEPT,…
WHST.11-12.7: RESEARCH TO AID IN PROBLEM SOLVING
Warm Up
What do you know about the physics
behind objects spinning in circles?
Try and explain the physics behind an
object spinning around a string?
Learning Goal: SWBAT experimentally determine
the period of a pendulum
Agenda:
1. Warm Up
2. Review HW
3. Period & Frequency
Homework
NA
AP Physics
Friday
14.12.05
f3A describing forces with velocity,
acceleration, etc.
RST.11-12.4 Meaning of symbols, key
terms, technical jargon
Problem Solvers
Warm Up
A child attempts to measure the
period of a ball on a string. The
child found that it took 60
seconds to make 20 revolutions.
Did the child succeed? What
would be the actual period and
frequency of the rotation?
Learning Goal: SWBAT experimentally determine
the period of a pendulum
Agenda:
1. Warm Up
2. Stamp HW
3. Review Lab
4. Pendulum Lab
Homework
Study for Test
FAP #14
1976B1. The two guide rails for the elevator shown above each exert a constant friction force of
100 newtons on the elevator car when the elevator car is moving upward with an acceleration
of 2 meters per second squared. The pulley has negligible friction and mass. Assume g = 10
m/s2.
a. On the diagram below, draw and label all forces acting on the elevator car. Identify the source
of each force.
b. Calculate the tension in the cable lifting the 400-kilogram elevator car during an upward
acceleration of 2 m/sec2. (Assume g 10 m/sec2)
c. Calculate the mass M the counterweight must have to raise the elevator car with an
acceleration of 2 m/sec2
B2007b1 (modified) A child pulls a 15 kg sled containing a 5.0 kg
dog along a straight path on a horizontal surface. He exerts a
force of 55 N on the sled at an angle of 20° above the horizontal, as shown
in the figure. The coefficient of friction between the sled and the surface is
0.22.
a. On the dot below that represents the sled-dog system, draw and
label a free-body diagram for the system as it is pulled along the
surface.
b. Calculate the normal force of the surface on the system.
c. Calculate the acceleration of the system.
d. At some later time, the dog rolls off the side of the sled. The child
continues to pull with the same force. On the axes below, sketch a graph of
speed v versus time t for the sled. Include both the sled's travel with and
without the dog on the sled. Clearly indicate with the symbol tr the time at
which the dog rolls off.
C#1 PERIOD, FREQUENCY, AND CIRCLES
1. If a car speeds around a track 15 times in 20 minutes, what is the car’s frequency &
period?
2. If a cowboy swings around a rope with a frequency of 1.2 Hz for a total of 1 minute,
what is the period and how many revolutions did the cowboy make?
3. What is the area of a circle with a radius of 4.0 m?
4. What is the circumference of a circle with a 20.0 m radius?
5. How far around will a circle with a radius of 2.0 m be?
6. If a car travels halfway around a circular track that has a 2000.0 m radius, how far did
the car travel.
7. If a circle with a radius of 8.2 m is jogged by a student in 6.7 seconds, what was the
student’s speed?
8. If a car makes it ¾ of the way across a track with a radius 1.0x10 4 m in 9 minutes
before it crashes. How fast was it going when it crashed?

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