# AP PHYSICS UNIT 1 Kinematics

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AP PHYSICS UNIT 1 Kinematics
PHYSICS LAB HYPER PHYSICS Section 1 One – Dimensional Motion Displacement Velocity (speed) Average Instantaneous Acceleration Constant Free Fall JAVA APPLETS WILEY APPLETS DAVIDSON APPLETS University of New South Wales Lessons – Mechanics Romac AP Physics Unit 1 Section 1

"In theory, theory and practice are the same.
"In theory, theory and practice are the same. In practice, they are not."... Albert Einstein (1879~1955, Mathematical physicist, Nobel Prize 1921-Physics) AP PHYSICS Multiple Choice Problems Education dot com LEARN AP PHYSICS 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
UNIT 1 Section 1 Lesson 1 Do Now! Measuring and Dimensions What are the units for Velocity? What is the UNIT for: Energy Work Heat Homework 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 Chapter One SI Units Dist = Meters Time = Seconds Mass = Kilograms Density Dimensional Analysis Significant figures Math Review Romac AP Physics Unit 1 Section 1

Motion Chap 2 Do Now! Pages 50 – 52 Homework
UNIT 1 Section 1 Lesson 2 Motion Chap 2 Objectives Do Now! Using Position vs. Time Graphs Using Data Calculate: Average Velocities Average Accelerations 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? Homework Pages 50 – 52 #’s 5, 6, 7, 9, 14, 15, 16, 17, 18 Romac AP Physics Unit 1 Section 1

Average acceleration:
UNIT 1 Section 1 Lesson 2 Definitions Average velocity: Average acceleration: Romac AP Physics Unit 1 Section 1

UNIT 1 Section 1 Lesson 2 Definition of Speed Speed is the distance traveled per unit of time (a scalar quantity). vs = = d t 20 m 4 s A B d = 20 m vs = 5 m/s Not direction dependent! Time t = 4 s Romac AP Physics Unit 1 Section 1

Definition of Velocity
UNIT 1 Section 1 Lesson 2 Definition of Velocity Velocity is the displacement per unit of time. (A vector quantity.) A B s = 20 m Time t = 4 s Δx=12 m 20o = 3 m/s at 200 N of E Direction required! Romac AP Physics Unit 1 Section 1

Calculate Average Velocity In Class
UNIT 1 Section 1 Lesson 2 PRACTICE / DEMO Cart Rolling down Ramp Measure Displacement Measure Time Calculate Average Velocity In Class Find the Equations (5) of one- dimensional motion . 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 Romac AP Physics Unit 1 Section 1

The BIG 5 Do Now! Homework Objectives UNIT 1 Section 1 Lesson 3
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 when a , Vi and t are known a when d , Vi , Vf and t are known 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? Homework Summary Sheet chap 2 terms, Solving for -Average Velocity -Acceleration -Final Velocity Problem Set Romac AP Physics Unit 1 Section 1

Vf2 = V02 + 2aΔd UNIT 1 Section 1 Lesson 3
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 Romac AP Physics Unit 1 Section 1

d = V0Δt + 0.5 a Δt2 UNIT 1 Section 1 Lesson 3
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 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 seconds. As time cannot be negative, t = 8.16 seconds. t = 8 seconds Romac AP Physics Unit 1 Section 1

d = Vavg * t = (V0 + Vf)/2 × t UNIT 1 Section 1 Lesson 3
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 Romac AP Physics Unit 1 Section 1

UNIT 1 Section 1 Lesson 3 A Sep 10 /11
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. Romac AP Physics Unit 1 Section 1

Position vs. time graph (velocity)
UNIT 1 Section 1 Lesson 3 Sep 10/11 Position vs. time graph (velocity) x, (m) Romac AP Physics Unit 1 Section 1

velocity vs. time graph (acceleration)
UNIT 1 Section 1 Lesson 3 Sep 10/11 velocity vs. time graph (acceleration) v, (m/s) Romac AP Physics Unit 1 Section 1

Graphical Analysis Dx Dt x2 x1 t2 t1 Dx Dt slope Displacement, x Time
UNIT 1 Section 1 Lesson 3 Graphical Analysis Average Velocity: Instantaneous Velocity: Dx Dt x2 x1 t2 t1 Dx Dt Time slope Displacement, x Romac AP Physics Unit 1 Section 1

Motion with Constant Acceleration
UNIT 1 Section 1 Lesson 3 Sep 10/11 In Class PRACTICE / DEMO Motion with Constant Acceleration 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 Romac AP Physics Unit 1 Section 1

Velocity LAB Labpro - Cart Homework Objectives Measuring times of roll
UNIT 1 Lesson 4 Sep ??? Velocity LAB Objectives Measuring times of roll Calculate THE ACCELERATION THE VELOCITIES OF AN F-150 ROLLING DOWN THE ACADEMIC WING HILL. Labpro - Cart Homework Complete LAB 1 BRING LAPTOP with “EXCEL” for next class Romac AP Physics Unit 1 Section 1

Lab Review - Excel Objectives Utilizing Excel
UNIT 1 LESSON 5 Fri Sep 14 Lab Review - Excel Objectives Do Now By Team swap labs Check Data and Calculations Read Results and Conclusion sections Evaluate Effort using EEMO Utilizing Excel Plot Data and obtain Graphs of: Position vs. Time Velocity vs. time Acceleration vs. time Homework On Excel create a graph that shows a Lacrosse ball falling at a constant acceleration of 9.8 m/s2 for 30 seconds. Romac AP Physics Unit 1 Section 1

Aaaaaaaah! Free Fall Homework Objectives
UNIT 1 Section 1 Lesson 6 TUES Sep 18 Aaaaaaaah! Free Fall Objectives Be able to utilize the BIG 5 Equations to calculate: Velocity Displacement of a falling {NO Friction} object on Earth Do Now! TEST ends at 11:25 am A lacrosse ball is dropped and falls from the BIW Crane. If the Cranes is 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. Homework Page 53 #’s 41, 43, 47, 48, 49, 52 Romac AP Physics Unit 1 Section 1

Sign Convention: A Ball Thrown Vertically Upward
UNIT 1 Section 1 Lesson 6 a = - v = 0 y = + a = - v = + y = + y = + a = - Displacement is positive (+) or negative (-) based on LOCATION. v = - UP = + v = - a = - y = 0 y = 0 Release Point Velocity is positive (+) or negative (-) based on direction of motion. y = -Negative v= -Negative a = - Acceleration is (+) or (-) based on direction of force (weight). Romac AP Physics Unit 1 Section 1

In Class Pages 41- 42 Examples PRACTICE / DEMO Free Fall Free Fall- 2
UNIT 1 Section 1 Lesson 6 In Class Pages Examples 2.10 – 2.11 – 2.12 PRACTICE / DEMO Free Fall Free Fall- 2 Romac AP Physics Unit 1 Section 1

Do Now! Data Tables and Graphs Objectives UNIT 1 Section 1 Lesson 7
Calculate: Instantaneous Velocities from data tables (and graphs) Illustration 2.3: Average and Instantaneous Velocity. Instantaneous Accelerations from data tables (and graphs) Calculus: Derivative 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. Homework Pg: 54 #52 Find the inst Velocity at t= 2.0 sec Find the inst acceleration at t = 2.0 sec #53, #54 Romac AP Physics Unit 1 Section 1

Constant Acceleration Motion
UNIT 1 Lesson 8 Constant Acceleration Motion Lab V-E4 Determining “g” on an incline (ramp and F – 150) DO NOW: What is the gravitational Acceleration in Bath, ME? Would it be larger or smaller on Mount Everest? Why? Homework: What is the gravitational Acceleration in Bath, ME? Formal LAB Write-up 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 I UNIT 1 Section 1 MOTION
Do NOW: TEST Homework: Chapter 3 Vectors Give and example when it they happened to YOU! Romac AP Physics Unit 1 Section 1

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