Motion Hewitt, Ch. 2.

Slides:



Advertisements
Similar presentations
Notes: 11.2 Speed & Velocity.
Advertisements

Usain Bolt is the world’s fastest man!!!
Please take out paper for notes!!
Speed and Acceleration
Chapter 2 Motion in One Dimension (Kinematics). 2.1 Displacement and Velocity Distance is a measure of the total motion of an object (how far it has traveled)
California State Standards Review
Speed and Acceleration Motion
Speed and Velocity Speed and Velocity
Linear Motion. You can describe the motion of an object by its position, speed, direction, and acceleration.
Review 1.This is the point that all motion will be measured relative to. A. Position B. Reference C. Displacement D. Distance.
Describing and Measuring Motion Section 1 Section 1.
Ch 11 Motion. Please define these vocabulary words: Distance Speed Average speed Instantaneous speed Velocity Acceleration Free fall Constant acceleration.
Instructional Objectives : 1.Research on motion and force 2. Research using virtual investigations Homework: Monday- Notes Ch.11) Vocabulary Tuesday-
Motion.
Ch TrueFalseStatementTrueFalse A frame of reference is objects moving with respect to one another Distance is the length between 2 points and.
Velocity + Acceleration. SI units  SI units needed  Time = seconds (s)  Other common units are the minute, hour, microsecond and nanosecond  Distance.
Usain Bolt is the world’s fastest man!!!. Physics of Motion We will look at: –Distance –Displacement –Speed First you need to realize that motion is relative…
Speed Today copy the words in red and underlined..
Speed, Velocity and Acceleration Unit 2: Linear motion.
Speed. Do you know how fast you can run? Do you know how fast you can ride your bike? Do you know how fast cars can drive on the street without getting.
Speed and Acceleration Motion
How Far? _________ (d) ______________________________________ To get to the store go 2-miles east, turn right and go 3-miles south. How far will you travel.
Notes on Motion III How Fast, How Far & How Long vdt.
Motion. Recognizing Motion An object is in motion when its distance from another object is changing. Whether an object is moving or not depends on your.
Physics: Speed and Velocity Average Speed  Rate at which an object moves  Units are in distance / time  Ex. Meters/second, centimeters/hour.
Chapter 4 Linear Motion You can describe the motion of an object by its position, speed, direction, and acceleration.
Section 1: Describing Motion. Speed Speed is how far you travel over a period of time. Speed is expressed in the formula s=d/t (speed = distance/time).
Measuring motion.
SPEED AND ACCELERATION. MOTION  Motion occurs when an object changes position relative to a reference point  You do not need to see an object in motion.
How to Calculate Speed and Acceleration
What is acceleration? – Probably heard it mean: “the process of speeding up” – More specifically: the rate at which velocity changes. Remember that velocity.
Motion:speed, velocity, Acceleration. Vector vs. Scalar  Scalar is a quantity with magnitude and no direction  Vector is a quantity with both magnitude.
Ch. 2 Section 1 Motion. What is motion? Motion is when an object changes position. How do you know that the racecar moved? –It changed its position on.
Speed What is motion? Motion: When an object changes position.
Speed, Acceleration, and Velocity What is motion? Think about it.. Think about it.. How can you tell when something is moving? How can you tell when.
Speed Chapter Speed Speed describes how fast an object moves.
Warm-up  Get your green folder  Open to notebook paper and label it “ Speed and Motion Notes”  Make sure your have something to write with  Write the.
Chapter 1: Motion Section 1: Describing and Measuring Motion How do you recognize motion? An object is in motion when its distance from another object.
Motion. Physics Science that involves matter and its motion through space and time. We just finished Chemistry: Study of the properties and behavior of.
Describing and Measuring Motion
Speed and Velocity Speed and Velocity
Motion Hewitt, Ch. 2.
KINEMATICS: Episode I How far did it go? How fast did it travel?
Section 1: Describing and measuring Motion
Speed.
How Fast, How Far & How Long
DO NOW: Have filmstrip and questions out on your desk.
Motion 10-1 Notes.
How fast we move and in what direction are we going.
Speed Distance an object travels in one unit of time.
Speed, Velocity and Acceleration
Speed!.
Chapter 2: Motion Section 1: Describing Motion
Speed & Velocity.
Motion.
Speed and Velocity.
EQ: How Can We Measure Speed?
Speed and Velocity 2017.
Motion.
Speed, Velocity, and Acceleration
Motion, Speed, Velocity, and Acceleration
If a 50 kg box has a 200 N force applied to it what is the acceleration?
Motion, Speed, Velocity, and Acceleration
Tues. Feb. 18 Do NOW What is the difference between an independent variable and a dependent variable? Give an example of each. Do lab activity with CPO.
Motion.
Motion Section 1.
Speed continued Distance – Time Graphs 2.1.
Linear Motion Chapter 2.1 & 2.2.
Linear Motion Chapter 2.1.
Describing and Measuring Motion
Presentation transcript:

Motion Hewitt, Ch. 2

Distance The space between two points Easy to measure in a classroom Harder outside Lasers (chains) Sextants Straight line?

Great Circle Routes and Rhumb Lines The shortest distance between any two points on Earth. Rhumb Line: Lines of constant direction and facilitate plotting directions between two points. From geo_tools1 GPH 111

Average Speed What is it? Total distance traveled per unit of time. If you did 55 miles in one hour, how fast do you think you were going in mph? 55 mph or miles per hour, or m/hr

The Formula Note: this formula does not take into account variations due to differences in speed during any point during its travel.

Units English: Metric: Miles, yards, feet, inches Metric: Kilometers, meters, centimeters, millimeters Since speed is measured as distance per unit of time, speed can be represented as: Miles/hour, kilometers/hour, feet/second, meters/second

Instantaneous Speed Instantaneous speed is the speed of an object at any instant in time. Ex. The speedometer in your car.

Measuring Speed Distance versus time Person walking m/sec Mi/hr Bowling balls rolling People Running

Running the 100m Race How do you think the runner’s speed changes during the race? 2007 World Championships 100m Final - Osaka, Japan What does the runner’s speed start at? What happens during the early part of the race? What happens during the latter part of the race?

Running the 200m race How would you run the 200 meter race compared to the 100 meter race? 2007 World Championships 200 m Final - Osaka, Japan - Usain Bolt 200m race

Running the 1500 m race How do you think the runner’s speed differs compared to that of the sprinter who runs 100m? 2007 World Championships 1500 meter Run - Osaka, Japan Men’s 1500m run 2014 Thorpe Cup

Example #1 Calculate the average speeds of women who hold Penn Relays records in the 100, 200, 400, and 1500 m runs. What is the pattern of speeds? Remember: v = d/t At 100 meters: v = (100 m)/(11.44 s) = 8.74 m/s At 200 meters: v = (200 m)/(23.66 s) = 8.45 m/s At 400 meters: v = (400 m)/(52.33 s) = 7.64 m/s At 1500 meters: v = (1500 m)/(264 s) = 5.68 m/s Note that as the distance increases, the speed decreases.

Example #2 How do the amounts of time taken to travel the first and last 50 meters of the race differ for a World Class Sprinter? It took 5.61 seconds to run the first half (50 meters) of the race. By subtraction, it took only 4.25 seconds to run the second half of the race. Therefore, it took 1.26 seconds less to run the second half of the race!

Mnemonic d v t

Examples If I am running at 10m/sec, how far do I go in 10 sec? 1 minute? If I go 2km in 30 minutes, how fast am I going? How long does it take me to go 100m at 5m/sec? d v t

Examples If I am driving at 50 mph, how far do I go in 1 hour? 30 minutes? If I go 10 miles in 15 minutes, how fast am I going? How long does it take me to go 100 mi at 20 mph? d v t

Examples 2) How far can I go if I travel at 50mph for 30 minutes? How far can I go in an hour if I am traveling at 55 mph? 2) How far can I go if I travel at 50mph for 30 minutes? 3) How far can I go if I travel 30 minutes at 50mph and 30 minutes at 30mph? 4) What is my average speed for this trip? (v = d/t) 5) If it takes 2 seconds for the sound of a gunshot to reach me, and the gun is fired from 1115 feet away, how fast is the speed of sound a) In feet per second? b) In miles per hour?

P T graphs What does a car speeding up at constant speed look like? What does a bowling ball rolling down a ramp look like? What does a car gently braking look like? What does a car slamming on the brakes look like?