Questions for Consideration What is frame of reference? What is frame of reference? What is distance? What is distance? How is displacement different from.

Slides:

Advertisements

Similar presentations

Velocity and Speed.

Advertisements

Chapter 2: Motion in One Dimension

Negative 10 Miles per Hour? Velocity and Speed.

Unit 1 Day 1 – Displacement v. Distance Mr. Rana 9/6/12.

All quantities in Physics can be categorized as either a scalar or a vector quantity. A scalar quantity has magnitude (amount) only without direction.

How do you know when an object is moving?

Linear Motion Review. 1.Speed is a ____ quantity. A.) vector B.) scalar C.) additive D.) subtractive.

Motion in One Dimension Kinematics. Distance vs. Displacement Distance – how far you’ve traveled Scalar quantity - 20 m Displacement – shortest distance.

Vocab (Leave room for definitions)  Position (x)  Displacement (∆x)= (x f -x i )  Distance (d)  Delta (Δ) – The symbol used to define change Final.

The Language of Motion Position – Velocity – Acceleration.

Chapter 2: Motion in One Dimension Section 1: Displacement & Velocity.

Displacement and Velocity Applied Physics 11. Position  Your position is the separation and direction from a reference point.  For example: 152 m [W]

Distance, Displacement, Speed, and Velocity

1 Motion along a straight line: Position, Displacement and Velocity Lecture 03 General Physics (PHYS101)

Physics Honors Lecture A & B Days 08/31/15 & 09/1/15 Motion in 1D.

Distance and Displacement,

Notes for Frame of Reference, Distance & Displacement. Write these notes in your IAN.

Speed and Acceration. distance Total distance an object travels from a starting point to ending point.

Velocity and Speed. Mechanics Branch of physics that studies motion Two parts Kinematics – describes motion Dynamics – tells why motion occurs.

Science Starter! With a partner, review: - Homework 2 (Conversions and Dimensional Analysis worksheet)

Distance, Speed and Time

Representing Motion Chapter 2. Important Terms Scalar: quantities, such as temperature or distance, that are just numbers without any direction (magnitude)

Introduction to One- Dimensional Motion. Quantities associated with motion Scalar Quantities do not have direction. Scalar quantities only have magnitude.

Monday, 9/27/15 OBJECTIVE: SWBAT Differentiate between speed and velocity and distance and displacement. Essential Question: How can we describe an object’s.

Displacement vs. Distance. Distance Distance (d) – how far an object travels. Distance (d) – how far an object travels. Does not depend on direction.

Kinematics The study of how objects move. Where are You? We must start with a question.

Distance & Displacement. Distance Distance (d) – how far an object travels Does not depend on direction Imagine an ant crawling along a ruler What distance.

Bellringer  Study for your quiz on simple machines.  When you finish turn in your paper in the basket.  Get out paper to take notes on. Title the notes.

SCALARS Scalars only have magnitude Scalars only have magnitude Magnitude means length Magnitude means length Example: 50 m Example: 50 m.

Scalars and Vectors. Definition Scalar – a quantity that has a magnitude only, no direction. * YES, scalars can have units. ** What scalars have we learned.

Speed: the distance an object travels per unit of time Speed = distance / time Average speed = total distance / total time Solve: A whitetail deer runs.

The Language of Motion Position – Velocity – Acceleration.

Speed & Velocity. Speed Anything that is in motion has speed. Speed is a scalar quantity—a measurement that does not include direction.

Speed vs Velocity. Learning Target I can explain the difference between speed and velocity. I can explain the difference between speed and velocity.

Motion Speed. Motion  Motion: A change in position Depends on reference point Is the mom moving relative to the dad? Is the mom moving if you were on.

Distance & Displacement. Distance is a Scalar A measure of the length of a path an object takes in moving from one position to another is called distance.

Object’s in Motion Study Guide – Chapter 4 1.Define and explain the difference between speed and velocity. 2.Define and explain the difference between.

Speed, Velocity & Acceleration. Speed (s) – rate at which an object is moving Does not depend on direction speed = distance ÷ time (s = d/t) Constant.

Motion, Speed, & Velocity. Motion Motion is a change in position (relative to a reference point) *reference point- stationary (still) object.

Motion Velocity & Acceleration. Speed vs. Velocity

 Please have a seat.  What is the change in velocity of a car that accelerates 50 m/s 2 for 0.25 seconds?  What is the speed of a car traveling 100m.

Chapter 2: Motion in One Dimension

Kinematics Speed & Velocity 7/7/2016TEKS 4A. Speed  Speed is the distance traveled per unit of time (a scalar quantity). v = = dtdt 20 m 4 s v = 5 m/s.

Motion in One Dimension - velocity. Motion – A change in position Motion.

Distance, Displacement, Speed, and Velocity

Distance, Displacement, Speed, and Velocity

Distance & Displacement

Do Now Read and annotate the reading passage. Answer the questions on the back.

Grade 8 Science Standards

Distance, Displacement, Speed, and Velocity

Speed & Velocity.

Describing Motion.

Distance, Displacement, Speed, and Velocity. Distance Distance (d) – how far an object travels. Distance (d) – how far an object travels. Does not depend.

Vocabulary Distance Velocity Speed Average Speed Displacement

Chapter 9 Section 2 Speed & Velocity

Distance & Displacement

Distance, Displacement, Speed, and Velocity

Distance & Displacement

DO NOW: (8/26/14) WRITE DOWN HW:

Distance, Displacement, Speed, and Velocity

Average Velocity Unit 8.2.

Distance, Displacement, Speed, and Velocity

Speed & Velocity.

Distance, Displacement, Speed, and Velocity

Motion Section 1.

Speed Velocity Acceleration

How fast objects travel

Intro to Motion Standards 1.1, 1.2.

Presentation transcript:

Questions for Consideration What is frame of reference? What is frame of reference? What is distance? What is distance? How is displacement different from distance? How is displacement different from distance?

Reference Frame Is the speed of the ball different relative to the pitcher, the truck driver, and the jet pilot? Why or why not? Is the speed of the ball different relative to the pitcher, the truck driver, and the jet pilot? Why or why not?

Distance Distance (d) – how far an object travels. Distance (d) – how far an object travels. Imagine an ant crawling along a ruler. Imagine an ant crawling along a ruler. What distance did the ant travel? What distance did the ant travel? d = 3 cm d = 3 cm cm

Distance Here’s our intrepid ant explorer again. Here’s our intrepid ant explorer again. Now what distance did the ant travel? Now what distance did the ant travel? d = 3 cm d = 3 cm Does his direction change the answer? Does his direction change the answer? cm

Distance Distance does not depend on direction. Distance does not depend on direction. Let’s follow the ant again. Let’s follow the ant again. What distance did the ant walk this time? What distance did the ant walk this time? d = 7 cm d = 7 cm cm

Displacement Displacement (  x) – difference between an object’s final position and its starting position. Displacement (  x) – difference between an object’s final position and its starting position. Does depend on direction. Does depend on direction. Displacement = final position – initial position Displacement = final position – initial position In order to define displacement, we need directions. In order to define displacement, we need directions. Examples of directions: Examples of directions: + and – + and – N, S, E, W N, S, E, W

Displacement vs. Distance Example of distance: Example of distance: The ant walked 3 cm. The ant walked 3 cm. Example of displacement: Example of displacement: The ant walked 3 cm EAST. The ant walked 3 cm EAST. An object’s distance traveled and its displacement aren’t always the same! An object’s distance traveled and its displacement aren’t always the same!

cm Displacement Let’s revisit our ant, and this time we’ll find his displacement. Let’s revisit our ant, and this time we’ll find his displacement. Distance: 3 cm Distance: 3 cm Displacement: +3 cm Displacement: +3 cm The positive gives the ant a direction! The positive gives the ant a direction!

Displacement Find the ant’s displacement again. Find the ant’s displacement again. Remember, displacement has direction! Remember, displacement has direction! Distance: 3 cm Distance: 3 cm Displacement: -3 cm Displacement: -3 cm cm

Displacement Find the distance and displacement of the ant. Find the distance and displacement of the ant. Distance: 7 cm Distance: 7 cm Displacement: +3 cm Displacement: +3 cm cm

Displacement vs. Distance An athlete runs around a track that is 100 meters long three times, then stops. An athlete runs around a track that is 100 meters long three times, then stops. What is the athlete’s distance and displacement? What is the athlete’s distance and displacement? Distance = 300 m Distance = 300 m Displacement = 0 m Displacement = 0 m Why? Why?

Questions for Consideration What is frame of reference? What is frame of reference? What is distance? What is distance? How is displacement different from distance? How is displacement different from distance?

Questions for Consideration What is speed? What is speed? What is velocity? What is velocity? What are scalar and vector quantities? What are scalar and vector quantities?

Speed Speed (s) – Rate at which an object is moving. Speed (s) – Rate at which an object is moving. speed = distance / time speed = distance / time Like distance, speed does not depend on direction. Like distance, speed does not depend on direction. S D T

Speed A car drives 100 meters in 5 seconds. A car drives 100 meters in 5 seconds. What is the car’s average speed? What is the car’s average speed? s = d/t s = d/t s = (100 m) / (5 s) = 20 m/s s = (100 m) / (5 s) = 20 m/s 100 m 1 s2 s3 s4 s5 s

Speed A rocket is traveling at 10 km/s. How long does it take the rocket to travel 30 km? A rocket is traveling at 10 km/s. How long does it take the rocket to travel 30 km?

Speed A racecar is traveling at 85.0 m/s. How far does the car travel in 30.0 s? A racecar is traveling at 85.0 m/s. How far does the car travel in 30.0 s?

Speed Graph Constant Speed Varying Speed

Velocity Velocity (v) – speed with direction. Velocity (v) – speed with direction. velocity = displacement / time velocity = displacement / time

Pulling It All Together Back to our ant explorer! Back to our ant explorer! Distance traveled: 7 cm Distance traveled: 7 cm Displacement: +3 cm Displacement: +3 cm Average speed: (7 cm) / (5 s) = 1.4 cm/s Average speed: (7 cm) / (5 s) = 1.4 cm/s Average velocity: (+3 cm) / (5 s) = +0.6 cm/s Average velocity: (+3 cm) / (5 s) = +0.6 cm/s cm s2 s3 s4 s5 s

Scalar and Vector Quantities Scalar Quantity – has magnitude but not direction. Scalar Quantity – has magnitude but not direction. Distance and speed are scalar quantities. Distance and speed are scalar quantities. Vector Quantity – has magnitude and direction. Vector Quantity – has magnitude and direction. Displacement and velocity are vector quantities. Displacement and velocity are vector quantities.