1. Chapter 1 Motion and Momentum
SEC. 1 What is Motion?

2. The Students Will: Define Speed, velocity and displacement
Graph Motion

3. Terms to Know Speed Average Speed Instantaneous Speed Velocity
Distance
Displacement

4. What is Motion? Movement--------- changes in position
Requires a point of reference (starting point)

5. What is Distance? The length of the route one travels
Ex. Distance from your house school
Expressed in Meters (m)/ Kilometers (km)

6. What is Displacement?
Includes the distance between the starting and ending points, and the direction in which you travel.
Ex. 40 m east

7. What is Speed?
The distance traveled divided by the time taken to travel the distance is called speed.
S= distance (meters)
time (seconds)

8. A passenger train travels from Boston to New York a distance of 350 km in 4 hours. What is the train’s speed?

9. If the car travels 400 m in 20 seconds how fast is it going?

10. Bart ran 5000 meters from the cops and a speed of 6 meters/second before he got caught. How long did he run?

11. If it takes Ashley 3 seconds to run from the batters box to first base at a speed of 6.5 meters per second, what is the distance she covers in that time?

12. 2 Kinds of Speed Average Speed
- The total distance traveled divided by the total time taken.
Instantaneous Speed
-the speed of an object at one instant of time.

13. Distance Time Graph
-Represents the motion of an object

14. What is Velocity?
The speed of an object and the direction of its motion is called velocity.

15. Sec. 2 ACCELERATION -

16. What is Acceleration?
The change in velocity divided by the time it takes for the change to happen.
-happens when an object speeds up or slows down.

17. 3 Ways to Accelerate:
SPEEDING UP
SLOWING DOWN
CHANGING DIRECTION

18. Formula:
Acceleration= final speed (m/s) – initial speed (m/s) time (s) a = sfi – si t

19. ACCELERATION NEGATIVE POSITIVE -OBJECT SLOWS DOWN -OBJECT SPEEDS UP
ZERO
-SPEED DOES NOT CHANGE

20. SPEED TIME GRAPH

21. Acceleration Problems
1. A roller coaster car rapidly picks up a speed as it rolls down a slope. As it starts down the slope, its speed is 4 m/s . But 3 seconds later, at the bottom of the slope, its speed is 22 m/s. What is its acceleration?

22. 2. A cyclist accelerates from 0 m/s to 8 m/s in 3 seconds
2. A cyclist accelerates from 0 m/s to 8 m/s in 3 seconds. What is his acceleration? Is this acceleration higher than that of a car which accelerates from 0 to 30 m/s in 8 seconds?

23. SEC 3 MOMENTUM

24. The Students will: Explain the relationship between mass and inertia.
Define Momentum
Solve problems using the Momentum Formula

25. Terms to Know:
Mass
Inertia
Momentum

26. What is Mass? The amount of matter in an object is called Mass.
Units-kilograms (kg)/grams (g), pounds (lbs)

27. The tendency of an object to resist change (position, movement) is called inertia.
--objects with mass – inertia

28. What is Momentum?
The measure of how hard it is to stop the motion of an object is called Momentum
Momentum (p) = mass (kg) x velocity (m/s)
p = mv

29. Law of Conservation of Mass:
The total momentum of the objects that collide is the same before and after the collision.