AP PHYSICS UNIT 1 Kinematics

Romac AP Physics Unit 1 Section 1

AP PHYSICS UNIT 1 KinematicsSection 1One – Dimensional Motion

DisplacementVelocity (speed)AverageInstantaneousAccelerationConstantAverageInstantaneous

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

http://www.walter-fendt.de/ph14e/










http://dev.physicslab.org/Default.aspx

http://dev.physicslab.org/Default.aspx








"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

http://www.learnapphysics.com/apphysicsc/index.html



http://www.free-test-online.com/ap-physics-c-problems/ap-physics-c-mechanics-questions



http://www.education.com/study-help/ap-notes-physics/

http://www.education.com/study-help/ap-notes-physics/


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


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


Motion Chap 2Objectives 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


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?


Definition of SpeedSpeed is the distance traveled per unit of time (a scalar quantity).

vs = = dt

20 m 4 s

vs = 5 m/s

Not direction dependent!

A

Bd = 20 m

Time t = 4 s



Definition of VelocityVelocity is the displacement per unit of time. (A vector quantity.)

Direction required!

A

Bs = 20 m

Time t = 4 s

Δx=12 m20o = 3 m/s at 200 N of

E



In ClassFind 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


http://webphysics.davidson.edu/physlet_resources/physlet_physics/contents/mechanics/one_d_kinematics/illustration2_3.html




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?



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



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



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



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






1 2 3 40123456789

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


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)



Graphical Analysis

Dx

Dt

x2x1

t2t1

2 1

2 1avg

x x xvt t t

D

D ( 0)inst

xv tt

D D

D

Dx

Dt

Time

slope

Disp

lace

men

t, x

Average Velocity: Instantaneous Velocity:



In ClassPRACTICE / DEMO Motion with Constant Acceleration http://www.walter-fendt.de/ph14e/acceleration.htm

HOMEWORK


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

http://www.walter-fendt.de/ph14e/acceleration.htm



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





Lab Review - Excel Objectives Utilizing Excel Plot Data and

obtain Graphs of: Position vs. Time Velocity vs. time Acceleration vs.

timeHomeworkOn 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


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.



Sign Convention: A Ball Thrown

Vertically Upward

• Velocity is positive (+) or negative (-) based on direction of motion.

• 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 = -



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








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


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.


http://www.animations.physics.unsw.edu.au/jw/calculus.htm




http://webphysics.davidson.edu/physlet_resources/physlet_physics/contents/mechanics/one_d_kinematics/prob2_1.html








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)


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


AP PHYSICS IUNIT 1 Section 1 MOTION

Do NOW:TEST

Homework: Chapter 3

VectorsGive and example

when it they happened to YOU!

AP PHYSICS UNIT 1 Kinematics

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