ap physics unit 1 kinematics section 1 one – dimensional motion displacement velocity (speed)...
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Romac AP Physics Unit 1 Section 1
AP PHYSICS UNIT 1 KinematicsSection 1One – Dimensional Motion
DisplacementVelocity (speed)
AverageInstantaneous
AccelerationConstantAverageInstantaneous
Free Fall
http://www.walter-fendt.de/ph14e/
JAVA APPLETS
http://higheredbcs.wiley.com/legacy/college/halliday/0471320005/simulations6e/index.htm?newwindow=true
WILEY APPLETS
http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html
HYPER PHYSICS
PHYSICS LABhttp://dev.physicslab.org/Default.aspx
http://webphysics.davidson.edu/physlet_resources/physlet_physics/contents/mechanics/one_d_kinematics/default.html
DAVIDSON APPLETS
http://www.animations.physics.unsw.edu.au/mechanics/
University of New South Wales Lessons – Mechanics
Romac AP Physics Unit 1 Section 1
"In theory, theory and practice are the same. In practice, they are not."...
Albert Einstein (1879~1955, Mathematical physicist, Nobel Prize 1921-Physics)
LEARN AP PHYSICShttp://www.learnapphysics.com/apphysicsc/index.html
http://www.free-test-online.com/ap-physics-c-problems/ap-physics-c-mechanics-questionsAP PHYSICS Multiple Choice Problems
http://www.education.com/study-help/ap-notes-physics/Education dot com
Romac AP Physics Unit 1 Section 1
Labs Lab AV-E1 Motion on an Incline Lab V-E2 Back and Forth Motion Lab V-E3 Cart on a Ramp (F-150) Lab V-E4 Determining “g” on an
incline (ramp and F – 150)
Read and be able to TYPE a formal lab write up using the Lab Format provided
Romac AP Physics Unit 1 Section 1
Measuring and Dimensions
Chapter One SI Units
Dist = Meters Time = Seconds Mass = Kilograms
Density
Dimensional Analysis
Significant figures
Math Review
Page 17-19 #4, 13, 14, 16,
26, 28, 29, 37 Page A.18
Exercises 2 – 6 even
Page A.19 Exercises 1,2,3
Page A.20-21 Exercises 1,2,3
UNIT 1 Section 1 Lesson 1
Do Now!
Homework
What are the units for Velocity?What is the UNIT for:
EnergyWorkHeat
Romac AP Physics Unit 1 Section 1
Motion Chap 2 Objectives
Using Position vs. Time Graphs
Using Data Calculate:
Average Velocities Average Accelerations
HomeworkPages 50 – 52
#’s 5, 6, 7, 9, 14, 15, 16, 17, 18
UNIT 1 Section 1 Lesson 2
Do Now!Men’s USA runner Maurice Greene won the gold in the 100 meter sprint with a time of 9.87 s. What was his average velocity?
If his initial velocity was 0, what was his average acceleration?
Romac AP Physics Unit 1 Section 1
Definition of Speed
Speed is the distance traveled per unit of time (a scalar quantity).
Speed is the distance traveled per unit of time (a scalar quantity).
vs = = d
t
20 m
4 s
vs = 5 m/svs = 5 m/s
Not direction dependent!
A
Bd = 20 m
Time t = 4 s
UNIT 1 Section 1 Lesson 2
Romac AP Physics Unit 1 Section 1
Definition of VelocityVelocity is the displacement per unit of time. (A vector quantity.)
Velocity is the displacement per unit of time. (A vector quantity.)
Direction required!
A
Bs = 20 m
Time t = 4 s
Δx=12 m
20o
= 3 m/s at 200 N of E
= 3 m/s at 200 N of E
UNIT 1 Section 1 Lesson 2
Romac AP Physics Unit 1 Section 1
In Class
Find the Equations (5) of one- dimensional motion
PRACTICE / DEMO
Cart Rolling down Ramp Measure Displacement Measure Time Calculate Average Velocity
. Illustration 2.3: Average and Instantaneous Velocity. Illustration 2.4: Acceleration and Measurement. Illustration 2.5: Motion on a Hill or Ramp.
Lab AV-E1 Motion on an Incline
UNIT 1 Section 1 Lesson 2
Romac AP Physics Unit 1 Section 1
The BIG 5 Objectives Utilize THE BIG FIVE
EQUATIONS!!!
Each student should be able to solve for :
Vf
when Vi, ,a and t are known Vi
when, Vf ,a and d are known d when Vf , Vi and t are known d when a , Vi and t are known a when d , Vi , Vf and t are known
Homework Summary Sheet chap 2 terms, Solving for
-Average Velocity
-Acceleration-Final Velocity
Problem Set
Do Now!Navy jets launch from aircraft carriers using catapults go from 0 to launch speed in 175 feet (5.334X 101 m) in 2.15 sec. What is the average velocity as it travels down the catapult?How far has it traveled at 1.10 seconds?
UNIT 1 Section 1 Lesson 3
Romac AP Physics Unit 1 Section 1
Vf2 = V0
2 + 2aΔd
Example: A train accelerates from 10 m/s to 40 m/s at an acceleration of 1m/s 2. what distance does it cover during this time.
Using V2 = V02 + 2aΔs, we sub in values 40 for V,
10 for V0 and 1 for a. Re-arranging to solve for s, we get:
ΔS = 750 m With Significant Digits ΔS = 800 m
UNIT 1 Section 1 Lesson 3
Romac AP Physics Unit 1 Section 1
d = V0Δt + 0.5 a Δt2
Example: A body starts from rest at a uniform acceleration of 3 m/s2. how long does it take to cover a distance of 100m.
Using d = V0Δt + 0.5 a Δt2, we sub in values 3 for a, 0 for V0 and 100 for s. Re-arranging the equation and
solving for t (using the quadratic formula), we get: t = 8.16 or -8.16 seconds. As time cannot be negative,
t = 8.16 seconds.
t = 8 seconds
UNIT 1 Section 1 Lesson 3
Romac AP Physics Unit 1 Section 1
d = Vavg * t = (V0 + Vf)/2 × t
Example: A car decelerates from 20.0 m/s to 10.0 m/s over a period of 10.0 seconds. How far does it travel during this time period.
Using d = (V0 + Vf)/2 × t, we sub in values
20.0 for V0, 10.0 for Vf and 10.0 for t. Solving
for s, we get: d = 150m
UNIT 1 Section 1 Lesson 3
Romac AP Physics Unit 1 Section 1
Note: All units must be converted such that they
are uniform for different variable throughout the calculations.
Time seconds Distance meters Velocity m/s Acceleration m/s2
Kinematic quantities (except time) are VECTORS and can be negative.
UNIT 1 Section 1 Lesson 3 A Sep 10 /11
http://webphysics.davidson.edu/physlet_resources/physlet_physics/contents/mechanics/one_d_kinematics/default.html
Romac AP Physics Unit 1 Section 1
1 2 3 40
1
2
3
4
5
6
7
8
9
No Motion (zero velocity)Uniform Motion (constant veloc-ity)Accelerated Mo-tion (Increasing/changing veloc-ity)
time, t (s)
position
x, (m)
Position vs. time graph (velocity)
UNIT 1 Section 1 Lesson 3 Sep 10/11
Romac AP Physics Unit 1 Section 1
1 2 3 40
1
2
3
4
5
6
7
8
9
Uniform Motion (zero Acceleation)Uniform Acceleration (constant accelera-tion)Decreasing Accelera-tion
time, t (s)
velocity
v, (m/s)
velocity vs. time graph (acceleration)
UNIT 1 Section 1 Lesson 3 Sep 10/11
Romac AP Physics Unit 1 Section 1
Graphical Analysis
Dx
Dt
x2
x1
t2t1
2 1
2 1avg
x x xv
t t t
( 0)inst
xv t
t
Dx
Dt
Time
slope
Dis
pla
cem
en
t,
x
Average Velocity: Instantaneous Velocity:
UNIT 1 Section 1 Lesson 3
Romac AP Physics Unit 1 Section 1
In ClassPRACTICE / DEMO Motion with Constant Acceleration http://www.walter-fendt.de/ph14e/acceleration.htm
HOMEWORK
UNIT 1 Section 1 Lesson 3 Sep 10/11
Summary Sheet chap 2 terms, Review Lab Format and truck Lab
for next class Solving for
-Average Velocity
-Acceleration-Final Velocity
Page 52 – 54 21, 25, 26, 31,33, 37, 41, 44,
66
Romac AP Physics Unit 1 Section 1
Velocity LAB Objectives
Measuring times of roll
Calculate THE ACCELERATION THE VELOCITIES
OF AN F-150 ROLLING DOWN THE ACADEMIC WING HILL.
Homework Complete LAB 1 BRING LAPTOP with
“EXCEL” for next class
UNIT 1 Lesson 4 Sep 11 -13???
http://dev.physicslab.org/Document.aspx?doctype=2&filename=Kinematics_LabProAcceleratedMotion.xml
Labpro - Cart
Romac AP Physics Unit 1 Section 1
Lab Review - ExcelObjectives Utilizing Excel Plot Data and
obtain Graphs of: Position vs. Time Velocity vs. time Acceleration vs.
time
HomeworkOn Excel create a graph that shows a Lacrosse ball falling at a constant acceleration of 9.8 m/s2 for 30 seconds.
UNIT 1 LESSON 5Fri Sep 14
Do NowBy Team swap labs Check Data and Calculations
Read Results and Conclusion sections
Evaluate Effort using EEMO
Romac AP Physics Unit 1 Section 1
Aaaaaaaah!Free Fall Objectives
Be able to utilize the BIG 5 Equations to calculate: Velocity Displacement
of a falling {NO Friction} object on Earth
Homework Page 53
#’s 41, 43, 47, 48, 49, 52
UNIT 1 Section 1 Lesson 6 TUES Sep 18
Do Now! TEST ends at 11:25 am A lacrosse ball is dropped and falls from the BIW Crane. If the Cranes is 350.0 ft tall (107.7 meters). How long will it take the ball to hit the ground?What will the velocity be?
. Illustration 2.6: Free Fall.
Romac AP Physics Unit 1 Section 1
Sign Convention: A Ball Thrown
Vertically Upward
• Velocity is positive (+) or negative (-) based on direction of motion.
• Velocity is positive (+) or negative (-) based on direction of motion.
• Displacement is positive (+) or negative (-) based on LOCATION.
• Displacement is positive (+) or negative (-) based on LOCATION.
Release Point
UP = +
• Acceleration is (+) or (-) based on direction of force (weight).
y = 0
y = +
y = +
y = +
y = 0
y = -Negative
v = +
v = 0
v = -
v = -
v= -Negative
a = -
a = -
a = -
a = -
a = -
UNIT 1 Section 1 Lesson 6
Romac AP Physics Unit 1 Section 1
In Class
Pages 41- 42 Examples 2.10 – 2.11 – 2.12PRACTICE /
DEMO Free Fall http://
higheredbcs.wiley.com/legacy/college/halliday/0471320005/simulations6e/index.htm?newwindow=true
Free Fall- 2 http://www.walter-fendt.de/ph14e/acceleration.htm
UNIT 1 Section 1 Lesson 6
Romac AP Physics Unit 1 Section 1
Data Tables and Graphs
OBJECTIVES
Calculate:Instantaneous Velocities from data tables (and graphs)
Illustration 2.3: Average and Instantaneous Velocity.
Calculate: Instantaneous Accelerations from data tables (and graphs)
Calculus:Derivativehttp://www.animations.physics.unsw.edu.au/jw/calculus.htm#Power
HOMEWORKPG: 54#52 FIND THE INST VELOCITY AT T= 2.0 SECFIND THE INST ACCELERATION AT T = 2.0 SEC #53, #54
UNIT 1 Section 1 Lesson 7
Do Now!What is the average acceleration of the A-6 Intruder as it travels down the catapult from 0 to 150 Knots (7.62 X 101 m/s) in 2.15 seconds?Problem 2.1: Position vs. time graph for
the T-bird. Problem 2.4: Two balls are putted with the same initial velocity on separate greens. Problem 2.5: Sketch velocity vs. time graph. Problem 2.7: Calculate the acceleration of 6 carts depending on the data given. Problem 2.8: The purple truck is catching up to the yellow truck.
Romac AP Physics Unit 1 Section 1
Constant Acceleration
MotionDO NOW:What is the gravitational Acceleration in Bath, ME? Would it be larger or smaller on Mount Everest? Why?
UNIT 1 Lesson 8
Homework:What is the gravitational Acceleration in Bath, ME?
Formal LAB Write-up
Lab V-E4 Determining “g”
on an incline (ramp and F – 150)
Romac AP Physics Unit 1 Section 1
UNIT 1 Lesson 9
You must know how to do these actions:
Calculate Average Velocities from data
Calculate Average Accelerations from data
Calculate times and distances given Average Velocities & Accelerations
Calculate Average Velocities & Accelerations given times and distances
Calculate and / or measure Average Velocities from data tables (and graphs)
Calculate and / or measure Average Accelerations from data tables (and graphs)
Calculate Acceleration due to gravity of an object in free fall
Calculate an objects velocity in free fall
Romac AP Physics Unit 1 Section 1
AP PHYSICS IUNIT 1 Section 1 MOTION
Do NOW:TEST
Homework: Chapter 3
VectorsGive and example
when it they happened to YOU!
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