1. Constant speed

2. A Data Table constant velocity Time 0 sec Position 1 meter Velocity
= dist/time & direction
1 sec
2 meters
1 m/s to right
2 sec
3 meters
3 sec
4 meters

3. Position-Time Graphs
Distance (ft) Vs. Time (sec.)
Distance in Feet
Time in Seconds 40
120
160
200 80
Describes the Rate of Change in Position of an Object Over Time

4. Position-Time Graph
Distance (ft) Vs. Time (sec.)
The constant slope indicates that the speed of the object remains constant
Distance in Feet
Time in Seconds 40
120
160
200 80
The Slope of this Line Remains Constant Throughout the Graph

5. Position-Time Graph The Speed of This Object Changes Over Time
Distance (ft) Vs. Time (sec.)
Distance in Feet
Time in Seconds 40
120
160
200 80
The Speed of This Object Changes Over Time C B
The Object is Accelerating A
= 5 ft/sec
= 24 ft/sec
= 50 ft/sec

6. Changes in Velocity Velocity changes in both these cases. 10 m/s,
downward
25 meters per second,
45 degrees upward
25 m/s,
downward
25 meters per second,
45 degrees downward

7. Interpret The Graph Below:

8. Balanced vs Unbalanced forces

9. Momentum P = mv *Depends on what two things? a. Mass b. Velocity
Units – kg. m/s, direction

11. 1. Two hockey players, big Joe and little Tim collide head on and get tangled while going for the puck. 65 kg Tim was travelling at 9.5 m/s while 105 kg Joe was moving at 5.2 m/s.
Who will go in which direction, and what is their momentum before the collision?

12. Interpret The Graph Below:

13. Interpret The Graph Below:

14. Interpret The Graph Below:

16. Acceleration a= v/t a=acceleration,v=velocity =change, t=time
*Change in velocity divided by the time interval in which the changed occurred
Units - m/s2, direction

17. A missile was released from an airplane at the velocity of 78 km/hr south and ended up traveling at a velocity of 104 km/hr south. It took the missile 1 hour to reach the target. Find the missile’s acceleration.
1.What do they want to know?
2. Which formula do I use.
3. Plug in the numbers.

18. A dog runs with an initial speed of 1.5 m/s
on a waxed floor. It slides to a stop with
an acceleration of -.35 m/s2 . How long
does it take for the dog to stop?

19. A football player likes to practice knocking the other players of their feet. He has a mass of kg and created a momentum of 3124 kg. mph as he flatten a teammate. What was his velocity when he hit his teammate?
1.What do they want to know?
2. Which formula do I use.
3. Plug in the numbers.

20. YouTube - smart car crash

21. Force Cause of acceleration, or change in an object’s velocity
F = ma, units – N, newtons
1 newton = .225 lb

23. Net force
Combination of all of the forces acting on an object

25. Gravity & Friction Gravity
Attraction of two particles of matter due to their mass
Mass & Distance effects it
9.8 m/s2
Friction
Force between two objects in contact that opposes the motion of either object

26. Explain what is happening

27. Weight
Elevator

28. Is your weight the same on earth as it is on the moon?
Is your mass the same on earth as it is
on the moon?

29. Mr. Dovzak
Mr. Dovzak