Introduction to Motion

Introduction to Motion

In each picture, what is moving and how is its position changing?

Describe the picture

Describe the picture

• 1. The train and all its passengers are speeding straight down a track to the next station. 

  2. The man and his bike are racing along a curving highway. 

  3. The geese are flying over their wetland environment.

   4. The meteor is shooting through the atmosphere toward Earth, burning up as it goes.

Motion

- is the change of position over time.

When describing motion, the answer depends on the POSITION and MOTION of the person observing you.

 

Example: Sitting at your desk, are you in motion? 

   Sitting in a car, are you in motion?

Multiple Choice

What is motion?

• change of speed over time

• change of position over time

• change of acceleration over time

• change of velocity over time

Predict

Even if you did not see this jump, but saw footprints on the starting line and in the sand, you know motion occurred because..

Predict

You can still know that he was in motion because of the distance between the starting and ending point (the jumper changed position).

Position

Describes the LOCATION of an object.

---Can be described using up, down, north, south, east, or west.

A position is compared to a REFERENCE POINT__. 

A REFERENCE POINT is the location to which you COMPARE another location.

Multiple Choice

A position is compared to a

• speed

• reference point

• location

Reference Point

A place or object used for COMPARISON to determine if something is in MOTION.   An object is in motion if it changes POSITION relative to a REFERENCE point.  

Ex: Stationary Objects; Tree, Building, Sign.

Multiple Choice

Reference Point

• A place or object used for comparison to determine if something is in motion.

• is the change of position over time

Yellow Dot

Where is this located?

North of DISCOVERY PLACE   South of FOURTH WARD ST        

East of SETTLER’S_CEMETERY             Corner of N CHURCH AND W 7TH_

The objects you described above can be called: REFERENCE POINT.

Multiple Choice

What information do you need to describe an object’s position?

• its speed

• a reference point

• its direction

• its size

Part 11: You can work on your own

VIDEO: https://www.youtube.com/watch?v=2KOUkDxtQkc