1. 15 Motion
Ms. Bachman

2. Vocabulary Motion Reference point International system of units (SI)
Distance
Speed
Average speed
Instantaneous speed
Velocity
Acceleration
Deceleration

3. What is Motion?
Motion- an object is in motion if its position changes relative to another object
Reference point- place or object used for comparison to determine if something is in motion
**You may or may not be moving based on the reference point you choose
Ex. your position compared to the sun

4. Measuring distance Distance- length of the path between 2 points
Measured in meters (m)
International system of units(SI)- system of measurement

5. Speed Speed- the distance an object moves per unit of time
Type of rate
Divide the distance the object travels by the amount of time it takes to travel that distance

6. Average speed
Average speed- divide the total distance traveled by the total time
Total distance km + 50km +12km = 65km
Total time h + 3h + 1h = 5h
Average speed km/ 5h= 13km/h

7. Instantaneous speed
Instantaneous speed- speed at which an object is moving at a given instant in time
*greater average speed wins the race

8. Velocity Velocity- speed in a given direction
Describes both speed and direction of an object
Can involve change in speed, direction, or both

9. Acceleration Acceleration- the rate at which velocity changes
Refers to increasing speed, decreasing speed, or changing directions
Whenever an object changes speed, the object accelerates
Deceleration- slow down, negative acceleration

10. Videos https://www.youtube.com/watch?v=xKmhS4qLj_s