8.2 Average Velocity.

Slides:



Advertisements
Similar presentations
PHYSICAL SCIENCE MOTION
Advertisements

Unit 02 Linear Motion Introduction to Motion ~Notes~
Motion: 8.2 THURSDAY APRIL 17 th Cheetah clip (c) McGraw Hill Ryerson 2007.
Displacement and Velocity Chapter 2 Section 1. Displacement Definitions Displacement – The change in position of an object from one point to another in.
8.1 The language of motion.
(c) McGraw Hill Ryerson Average Velocity Speed ( ) is the distance an object travels during a given time interval divided by the time interval.
What is motion? Motion is the change in the position of an object. To describe the motion of an object we use terms like: Distance, displacement, speed,
Take out the guided reading notes from yesterday and continue working on them - you have 15 minutes before we start notes Take out the guided reading notes.
Linear motion: motion in a single dimension (in a line). Rate: A quantity divided by time Representing Motion Linear motion: motion in a single dimension.
Speed ( ) is the distance an object travels divided by the time to travel that distance. In other words –Speed is a scalar quantity (no direction). These.
UNIT #3 – CHAPTER #8.2 – AVERAGE VELOCITY. Objectives  Be able to calculate average velocity, displacement, and time interval for an object in uniform.
Which line represents the greater speed? Graphing motion The greater the speed, the steeper the slope.
Chapter 2: Motion.  Compare your maximum speed with that of a cheetah, horse, elephant, and snake. Could you win a race against any of them?
Distance and Displacement Speed and Velocity GraphingAcceleration Final Jeopardy Physics Jeopardy.
Unit 2: Physics Chapter 3: Describing Motion.
Speed ( ) is the distance an object travels divided by the time to travel that distance. In other words –Speed is a scalar quantity (no direction). These.
Relationship between time, displacement, velocity, acceleration. Kinematic.
Motion. Motion a change in an object’s position Motion Linear motion: motion in a single dimension (in a line). Rate: A quantity divided by time - tells.
Introduction to One- Dimensional Motion. Quantities associated with motion Scalar Quantities do not have direction. Scalar quantities only have magnitude.
Velocity is a vector quantity therefore must include direction.
Speed ( ) is the distance an object travels divided by the time to travel that distance. In other words –Speed is a scalar quantity (no direction). These.
READ PAGES Physics Homework. Terms used to describe Physical Quantities Scalar quantities are numbers without any direction Vector quantities that.
(c) McGraw Hill Ryerson Average Velocity Pages 362 – 375 Words to Know:  average velocity  Speed  Velocity.
1.1Motion and Motion Graphs. Kinematics Terminology Scalar vs. Vector Scalar: quantities that have only a size, but no direction – ie: distance, speed.
Motion Quiz. 1. The slope of a position (distance) vs time graph equals what quantity of the motion?
How Far? distance: –symbol: d –units: meters displacement: –symbol: –units: meters How far an object has traveled Is a “vector” quantity How far an.
Journal #7 Most missed question on the test: The total mass of four containers is 3.500kg. If A is 256g, B is 5917cg, and C is 382g, what is the mass.
B1.2 Velocity.
Distance and Velocity Chapter 11.1 Notes. Objects in Motion Motion is all around us—from a car driving in a straight line to a satellite circling the.
Speed ( ) is the distance an object travels divided by the time to travel that distance. In other words –Speed is a scalar quantity (no direction). These.
Speed Velocity and Acceleration. What is the difference between speed and velocity? Speed is a measure of distance over time while velocity is a measure.
9.1 Describing Acceleration An object travelling with uniform motion has equal displacements in equal time intervals. 1.8m 1.8m 1.8m 1.8m (  d) 0s 1s.
Ch. 8.2 Average Velocity Speed ( ) is the distance an object travels divided by the time to travel that distance. In other words Speed is a scalar quantity.
Chapter 5: Investigating Motion
Ch. 8.2 Average Velocity Speed ( ) is the distance an object travels divided by the time to travel that distance. In other words Speed is a scalar quantity.
8.2 Average Velocity Science 10.
Many words are used when describing motion.
More about Velocity Time Graphs and Acceleration
Displacement-Time Graphs
8.2 Average Velocity.
Motion Chapter 11.
Speed & Velocity.
Vocabulary Distance Velocity Speed Average Speed Displacement
Ch. 8.2 Average Velocity Speed ( ) is the distance an object travels divided by the time to travel that distance. In other words Speed is a scalar quantity.
Velocity is a vector quantity and must include direction.
Ch. 8.2 Average Velocity Speed ( ) is the distance an object travels divided by the time to travel that distance. In other words Speed is a scalar quantity.
Average Velocity PowerPoint 8.2.
Motion.
8.1 The Language of Motion Common words used to describe motion:
Graphing Motion Walk Around
8.2 Speed Vs Velocity Speed (v):
Motion in 1D, Vectors and Velocity
Speed and Velocity.
Speed is a scalar quantity because it has no direction.
Language of Motion.
Describing Motion Notes Section 1: Position and Motion
Speed Speed (ν) is the distance an object travels during a given time interval divided by the time interval. Speed is a scalar quantity. The SI unit for.
Average Velocity Unit 8.2.
Average Velocity.
B1.2 Velocity.
Velocity is a vector quantity and must include direction.
Ch. 8.2 Average Velocity Speed ( ) = the distance an object travels divided by the time to travel that distance. Speed is a scalar quantity (no direction).
8.2 Average Velocity: Calculating The rate and Direction of movement
9.2 Calculating Acceleration
X-t Graphs.
Motion.
Kinematics: Displacement and Velocity
Speed Velocity Acceleration
Position, Speed and Velocity
Presentation transcript:

8.2 Average Velocity

The SI unit for speed and velocity is metres per second (m/s). Review Speed ( ) is the distance an object travels divided by the time interval of travel. Speed is a scalar quantity. Velocity ( ) is the displacement of an object divided by the time interval. Velocity is a vector quantity therefore must include direction. The SI unit for speed and velocity is metres per second (m/s). These two ski gondolas have the same speed but have different velocities since they are travelling in opposite directions.

Calculating Average Velocity The relationship between average velocity, displacement, and time is given by: Use the above equation to answer the following: What is the average velocity of a dog that takes 4.0 s to run forward 14 m? A boat travels 280 m East in a time of 120 s. What is the boat’s average velocity? 3.5 m/s [forward] 2.3 m/s [E]

Calculating Displacement The relationship between displacement, average velocity, and time is given by: Use the above equation to answer the following: What is the displacement of a bicycle that travels 8.0 m/s [N] for 15 s? A person, originally at the starting line, runs west at 6.5 m/s. What is the runner’s displacement after 12 s? 120 m [N] 78 m [W]

Calculating Time The relationship between time, average velocity, and displacement is given by: Use the above equation to answer the following: How long would it take a cat walking north at 0.80 m/s to travel 12 m north? A car is driving forward at 15 m/s. How long would it take this car to pass through an intersection that is 11 m long? 15 s 0.73 s

Practice Workbook page 156 OMIT: 3)f) and g)

Calculating the Slope of the Position-Time Graph The slope of a graph is represented by rise/run. On a position-time graph the slope is the change in position ( ) divided by the change in time ( ). The steeper the slope the greater the change in displacement during the same time interval, so the greater the velocity. Which jogger’s motion has a greater slope? Which jogger is moving faster?

Calculating the Slope of the Position-Time Graph Calculate the slope of both Jogger A and B: Which jogger’s motion has a greater slope? Which jogger is moving faster? Jogger A : 4 m/s Jogger B : 2 m/s

Average Velocity The slope of a position-time graph is the object’s average velocity. Average velocity is the rate of change in position for a time interval. The symbol of average velocity is: On a position-time graph, if forward is called “positive”: A positive slope means that the object’s average velocity is forward. A negative slope means that the object’s average velocity is backwards. Zero slope means the object’s average velocity is zero.

Practice Workbook page 158