1 / 29

PHYSICS I UNIT 1 Motion

PHYSICS I UNIT 1 Motion. JAVA APPLETS. http ://www.walter-fendt.de/ph14e /. WILEY APPLETS. Kinematics One – Dimensional Motion. http:// higheredbcs.wiley.com/legacy/college/halliday/0471320005/simulations6e/index.htm?newwindow=true. UNIT 1 Lesson 1. Lesson One Motion chap 2. Do Now!.

jayme
Télécharger la présentation

PHYSICS I UNIT 1 Motion

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. PHYSICS IUNIT 1 Motion JAVA APPLETS http://www.walter-fendt.de/ph14e/ WILEY APPLETS Kinematics One – Dimensional Motion http://higheredbcs.wiley.com/legacy/college/halliday/0471320005/simulations6e/index.htm?newwindow=true

  2. UNIT 1 Lesson 1 Lesson One Motion chap 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? Honor: If his initial velocity was 0, what was his average acceleration? Objectives Homework Problems pg 52 #’s 43 – 50 ALL Problems pg 52 #’s 51 – 61 ODD • Using Position vs. Time Graphs • Using Data • Calculate: • Average Velocities • Average Accelerations

  3. UNIT 1 Lesson 1 B d t 20 m 4 s vs = = A Definition of Speed • Speedis the distance traveled per unit of time (a scalar quantity). d = 20 m vs = 5 m/s Not direction dependent! Time t = 4 s

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

  5. UNIT 1 Lesson 1 Lesson # 1 In Class PRACTICE / DEMO Cart Rolling down Ramp Measure Displacement Measure Time Calculate Average Velocity Position vs. Time http://webphysics.davidson.edu/physlet_resources/physlet_physics/contents/mechanics/one_d_kinematics/default.html Constant Acceleration vs. Time http://webphysics.davidson.edu/physlet_resources/physlet_physics/contents/mechanics/one_d_kinematics/default.html Equations of one- dimensional motion page 51 Answer Review Concepts page 39 practice problems #’s 9 – 13

  6. UNIT 1 Lesson 2 The BIG 5 Chap 3 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? Objectives Homework Summary Sheet chap 3 terms, Solving for -Average Velocity -Acceleration, Final Velocity Page 61 & 64 Practice Problems 1 – 10 ALL • Utilize THE BIG FIVE EQUATIONS!!!Equations on Page 79 (Chapter 3) • 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, Vfand t are known

  7. UNIT 1 Lesson 2 Vf2 = V02 + 2aΔd E.g. 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

  8. UNIT 1 Lesson 2 d = V0Δt + 0.5 a Δt2 E.g. 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 = 8.51 or -8.51 seconds. As time cannot be negative, t = 8.51 seconds. t = 9 seconds

  9. UNIT 1 Lesson 2 d = Vavg * t = (V0 + Vf)/2 × t 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

  10. UNIT 1 Lesson 2 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.

  11. UNIT 1 Lesson 2 In Class PRACTICE / DEMO Motion with Constant Acceleration http://www.walter-fendt.de/ph14e/acceleration.htm HOMEWORK • Pages 60 – 63 • Examples 1 and 2 Summary Sheet chap 3 terms, Solving for -Average Velocity -Acceleration, Final Velocity Page 61 & 64 Practice Problems 1 – 10 ALL REVIEW LAB I {F-150} Work Sheet

  12. UNIT 1 Lesson 3 Data Tables and Graphs 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? Objectives Homework Pg: 65 - 71 Practice Problems #19, 22, 25, 27 32 #41   • Calculate: Average Velocities from data tables (and graphs) • Calculate: Average Accelerations from data tables (and graphs)

  13. UNIT 1 Lesson 3 Position vs. time graph (velocity) x, (m)

  14. UNIT 1 Lesson 3 velocity vs. time graph (acceleration) v, (m/s)

  15. UNIT 1 Lesson 3 slope x2 Dx Dx Displacement, x x1 Dt Dt t1 t2 Time Graphical Analysis Average Velocity: Instantaneous Velocity:

  16. UNIT 1 Lesson 3 Uniform Acceleration in One Dimension: • Motion is along a straight line (horizontal, vertical or slanted). • Changes in motion result from a CONSTANT force producing uniform acceleration. • The velocity of an object is changing by a constant amount in a given time interval. • The moving object is treated as though it were a point particle.

  17. vo = 400 ft/s Δx =300 ft vf= 0 + Example 6:An airplane flying initially at 400ft/s lands on a carrier deck and stops in a distance of 300 ft. What is the acceleration? Step 1. Draw and label sketch. Step 2. Indicate + direction

  18. + Example: (Cont.) vo = 400 ft/s vf= 0 Δx =300 ft Step 3. List given; find information with signs. Given:vo = 400 ft/s - initial velocity of airplane v = 0 - final velocity after traveling Δx = +300 ft Find:a = ? - acceleration of airplane

  19. 0 -vo2 2x -(400 ft/s)2 2(300 ft) a = = Given:vo = +400 ft/s Step 4. Select equation that contains aand not t. v = 0 Δx = +300 ft vf2 - vo2= 2aΔx Why is the acceleration negative? a = - 300 ft/s2 Because Force is in a negative direction which means that the airplane slows down

  20. UNIT 1 Lesson 4 Lesson #Velocity LAB Objectives Homework Complete LAB 1 BRING LAPTOPwith “EXCEL” for next class • Measuring times of roll • Calculate • THE ACCELERATION • THE VELOCITIES • OF AN F-150 ROLLING DOWN THE ACADEMIC WING HILL.

  21. UNIT 1 LESSON 5 Lab Review - Excel Do Now! By Team swap labs Check Data and Calculations Read Results and Conclusion sections Evaluate Effort using EEMO Objectives Homework On Excel create a graph that shows a Lacrosse ball falling at a constant acceleration of 9.8 m/s2 for 30 seconds. ..\..\Physics I LABs\Motion\CarAvs Car B Graphs and data tables.xls • Utilizing Excel • Plot Data and obtain Graphs of: • Position vs. Time • Velocity vs. time • Acceleration vs. time

  22. UNIT 1 Lesson 6 Aaaaaaaah!Free Fall Do Now! 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? Objectives Homework Page 74 Practice Problems #’s 42 – 46 Section Review #’s 47 Page 82 #’s 97, 100, 101 • Be able to utilize the BIG 5 Equations to calculate: • Velocity • Displacement of a falling {NO Friction} object on Earth

  23. UP = + a = - v = 0 y = + Sign Convention:A Ball Thrown Vertically Upward a = - v = + y = + y = + a = - • Displacement is positive (+) or negative (-) based on LOCATION. v = - v = - y = 0 a = - 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).

  24. UNIT 1 Lesson 6 In Class PRACTICE / 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 • Page 74 Practice Problems #’s 42 – 46 • Section Review #’s 47 • Page 82 #’s 97, 100, 101

  25. UNIT 1 Lesson 7 LAB 2 Calculate Gravitational - Acceleration in BATH, ME Objectives Homework Finish LAB REPORT Typed • Be able to utilize the BIG 5 Equations to calculate: • Velocity • Displacement • Acceleration of a moving object Do Now! 2 minutes 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?

  26. UNIT 1 Lesson 8 • 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 Constant Acceleration Motion DO NOW: What is the gravitational Acceleration in Bath, ME? Would it be larger or smaller on Mount Everest? Why?

  27. UNIT 1 Lesson 8 • In Class / Homework: • Page 82 – 83 • #’s 103, 107, 108, 109, 110, 111, 11, 113 REVIEW Test Lesson 10

  28. LESSON 9 Review Do Now:Page 85 #’s 1 – 9 ODD

  29. PHYSICS IUNIT 1 MOTION Homework: Chapter 4 What are Newton’s THREE Law’s Give and example when it they happened to YOU! Do NOW: TEST

More Related