Motion and Position Concepts in Physics
Concepts in physics related to motion, speed, velocity, distance, displacement, and position. Understand the differences between speed and velocity, as well as distance and displacement. Discover how to interpret graphs representing motion over time and solve equations related to position. Dive into practical examples and experiments to deepen your understanding of these fundamental principles.
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Presentation Transcript
Speed vs. Velocity P-T Graphs Mr. Fedell
1- Direction Motion VOCAB Position: Where you are Both in Meters Distance: How far you went Time: When something happens Both in Seconds Elapsed time: How long it took
Distance vs. Displacement Total Distance = ________m - How far you go in any direction - Direction doesn t matter - Can never be NEGATIVE! Displacement = ________m - Final position & starting position - Direction DOES matter - Can be negative
Distance vs. Displacement Example #1 Distance Displacement Ave Speed = Ave Velocity =
Distance vs. Displacement Example #2 Silver Fox is running around trying to catch a troublemaker. He starts on the 5m mark, goes out to 9 meters, then back to 2 meters, and finally catches them at the 4m mark. He does all this in 5 seconds. What is his: a) b) Total displacement? c) Avg speed? d) Avg velocity? Total distance?
Substituted Equation 1. Start with y=mx + b form 2. Get rid of (y) and (x) 3. Replace them with letters from the experiment 4. Keep the numbers the same
Substituted Equation Example A graph of your position vs. time was found to have a slope of 12.4 m/s and y-intercept of 4.0 m a) What was your position at 10 seconds? b) How long had it been when your position was 25m?
In the CAR LAB The car had constant velocity Constant velocity = not speeding up or slowing down cruise control Any straight line P-T graph (P-T = position vs. time) In Logger Pro labs detector is the origin.
In the CAR LAB The slope of a position time (P-T) graph is equal to the _______________. Still 0 Slope 0 Velocity CV - Away + slope + velocity (Forward) CV - Towards - slope - velocity (Reverse)
Car Labwith Logger Pro Open Logger Pro on your laptop. File Open Additional Physics Real-time physics Mechanics Open file distance Plug in the motion detector into the LabPro port DIG/SONIC1 Plug in the LabPro USB cable into the laptop Collect these graphs: - CV Away - Still - CV Towards Draw WELL-LABELED graphs at the bottom of your paper. - Press Collect - Wait for the clicking noise to start - Release the Jeep, let it drive straight - Select the part of the graph where the car was driving - Press Linear Fit to measure the slope of the lines
Concept Review Sign (+ away/- towards) determines direction Straight line = constant velocity Curved line = speed up/slow down Linear lines use slope: y=mx+b
Motion Maps The graph can also be represented as a motion map. Graph Motion Map - is this graph changing speed or constant speed? - is the slope (+) or (-) - does the graph indicate (+) or (-) displacement? - is the motion of the object towards or away
Time topractice Left Side Page 1 1. Still 2. CV away 3. CV towards 4. Speed up away 5. Slow down - away 6. Speed up towards 7. Slow down - towards
Racing Questions Which car is moving faster A or B? Head start & Foot race
Speeding up or Slowing down Speed up away Slow down away Horizontal: Vertical: Speed up toward Slow down - toward
Practice - Page 3 DO NOT WORK AHEAD!!!
Practice Page 4 DO NOT JUMP BACK TO PAGE 1!!!
Sample Quiz Question #1 a) How fast was the object going? b) What is the equation of the line in y=mx+b format? c) What is the substituted equation?
Sample Quiz Question #2 a) How fast was the object going? b) What is the equation of the line in y=mx+b format? c) What is the substituted equation?
Sample Quiz Question #3 Find total distance traveled: Find total displacement: How fast was the object moving at each stage?
Practice #4 A,C,E - curves 1. Velocity is constant D 2. Velocity is changing C E 3. + velocity B F 4. -velocity A G 5. Speeding up 6. Slowing down 7. Moving away from origin 8. Moving towards origin
Graph Matching Lab 1. Go to a station with a laptop 2. Open Logger Pro. 3. Connect the LabPro and Motion Detector (Dig/Sonic1) 4. File Open EAS_SHARES Drive Bauer STU_SHARE Logger Pro Files Graph Matching Folder 5. Your group s job is to match graphs 1-8! One group member will perform the official version when I come by.
