AP PHYSICS UNIT 1 Kinematics Section 1 One – Dimensional Motion Displacement Velocity (speed) Average Instantaneous Acceleration Constant Average Instantaneous Free Fall http ://www.walter-fendt.de/ph14e / JAVA APPLETS http:// higheredbcs.wiley.com/legacy/college/hall iday/0471320005/simulations6e/index.htm?n ewwindow=true WILEY APPLETS http:// hyperphysics.phy-astr.gsu.edu/hbase/hfram e.html HYPER PHYSICS PHYSICS LAB http:// dev.physicslab.org/Default.aspx http:// webphysics.davidson.edu/physlet_resources/physlet_physics/contents/mecha nics/one_d_kinematics/default.html DAVIDSON APPLETS http://www.animations.physics.unsw.edu.au/mechanic s University of New South Wales Lessons – Mechanics Romac AP Physics Unit 1 Section 1
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AP PHYSICS UNIT 1 Kinematics Section 1 One – Dimensional Motion Displacement Velocity (speed) Average Instantaneous Acceleration Constant Average Instantaneous.
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Romac AP Physics Unit 1 Section 1
AP PHYSICS UNIT 1 KinematicsSection 1One – Dimensional Motion
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.
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?
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.