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)