7.P.1.1, 7.P.1.3 & 7.P.1.4 Motion What is motion What is speed Types of speed How do you calculate speed What is velocity What is a vector 3 ways to change velocity (car) What is acceleration How do you calculate acceleration What is position What is a reference point How do you describe position How do you measure distance change in position measured by distance and time An object in motion changes position Newton’s 3 laws help predict motion measures how fast position changes average speed - represents all speeds between two points =total distance/total time constant speed - speed that does not change Represented by straight line on graph Speed = distance/time Speed AND direction on a moving object Can change even if speed is remaining constant (escalator) Example: 60 km/h West Quantity that has both size and direction 1. Accelerate 2. Decelerate 3. Change direction Measure of how fast velocity changes acceleration = final velocity - initial velocity / time location of a place or object Determines position of object 1. Reference point – location compared to other locations 2. Graph – longitude (N & S) & latitude (E & W) Depends on the information you are seeking Unit of measurement meter (m) Straight line Total length Easiest method is to use a graph
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7.P.1.1, 7.P.1.3 & 7.P.1.4 Motion
What is motion
What is speed
Types of speed
How do you calculate speed
What is velocity
What is a vector
3 ways to change velocity (car)
What is acceleration
How do you calculate acceleration
What is position
What is a reference point
How do you describe position
How do you measure distance
How do you describe motion
Distance-time graph
Must know about distance-time graphs
change in position measured by distance and time
· An object in motion changes position
· Newton’s 3 laws help predict motion
measures how fast position changes
average speed - represents all speeds between two points
· =total distance/total time
constant speed - speed that does not change
· Represented by straight line on graph
Speed = distance/time
Speed AND direction on a moving object
· Can change even if speed is remaining constant (escalator)
· Example: 60 km/h West
Quantity that has both size and direction
1. Accelerate
2. Decelerate
3. Change direction
Measure of how fast velocity changes
acceleration = final velocity - initial velocity / time
location of a place or object
Determines position of object
1. Reference point – location compared to other locations
2. Graph – longitude (N & S) & latitude (E & W)
Depends on the information you are seeking
Unit of measurement meter (m)
· Straight line
· Total length
Easiest method is to use a graph
Plot distance against time
· Time is ALWAYS on x-axis (bottom of graph)
· Distance is ALWAYS on the y-axis (side of graph)
1. Steeper the graph = faster the motion
2. Horizontal line means the object is not changing position – its at rest
3. Downward slope = object is returning to start
Answer the following questions:
1. What is the difference between motion and speed? Use T chart to answer this
2. What is the difference between speed and velocity? Use T chart to answer this
Practice solving speed, distance, time, acceleration & velocity problems
Practice solving distance-time graphs
http://www.slideshare.net/harlie90/distance-time-graphsplenaryquiz?qid=7e959391-8105-4e1d-bc3b-9adbbddb6126&v=qf1&b=&from_search=1
Have students create their own distance-time graph (lab)
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