2. To understand motion is to understand nature - Leonardo Da VinciLeonardo Da Vinci

3. Determine when an object is in motion.Calculate an object’s speed and velocity.Demonstrate how to graph motion.

4.  Motion- if its distance from another object is changing then an object is in motion  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.

5.  These are objects that make good reference points.

6.  You are on Bus C looking at Bus D-oh my you are rolling backwards!!  Or are you?

7.  Nope!!! As a matter of fact, you’re not moving at all!  But Bus D did move forward!  Did you choose a good reference point? C D

8.  Whether or not an object is in motion depends on the reference point you choose.

9.  The plane does not appear to be moving.  The skydivers appear to be moving.  The Ground appears to be moving.

10.  The plane appears to be moving.  The skydivers do not appear to be moving.  The ground is coming closer.

11.  The plane appears to be moving.  The skydivers are coming closer.  The ground is not moving.

12.  International System of Units (SI)  To measureUse these units -Length-meter -volume-liter -time-seconds -mass-kilogram

14.  How many centimeters are in 22.5 m?  Convert 1.6km to meters.  Convert 119cm to meters.  Convert 6548 m to millimeters.

15.  Speed= distance/ time s= d/t  Possible units for speed are Kilometer per hour (km/hr) or Meter per seconds (m/s)  *if you know the distance an object travels in a certain amount of time, you can calculate the speed of the object.

16.  Total distance divided by total time traveled  To find average speed. › Bike race with hills-Can you have a constant speed? Total distance =32km + 13km = 45km Total time = 2 hr + 1hr = 3 hrs 15 km/hr

17.  The rate at which an object is moving at a given instant in time.

18.  Speed in a given direction  Velocity is important to prevent collisions

19.  Time –x-axis (horizontal axis)  Distance – y-axis (vertical axis)  You can show the motion of an object on a line graph in which you plot distance versus time.  A point on the line represents the distance an object has traveled at a particular time

20.  Slope-steepness of a line on a graph  Slope= rise/ run  Slope represents speed since: › Rise=distance /run=time