1. Motion Exam Review Problem #1
1. Using this distance - time graph, calculate the average SPEED.

2. Answer Problem #1
1. S =?    D=60km       T=4hr S = D/T S = 60 km / 4hr S = 15 km/hr

3. Motion Exam Review Problem #2
2. Part #1: Calculate the speeds of segments A, B, & C. Part #2: What is the total average speed of the trip?

4. Answer Problem #2
2. a) 12m / 6s = 2m/s     b) 0 m / 8s = 0 m/s     c) 4m / 4s = 1m/s Part #2:  16m / 18s = 0.89 m/s

5. Motion Exam Review Problem #3
3. If this is a graph showing a straight line for speed versus time, what does it say about acceleration?

6. Answer Problem #3
3. Since the speed is increasing at a constant rate (straight line), then you do have acceleration.

7. Motion Exam Review Problem #4
4. a) Which line segments show positive acceleration? b) Which line segments show negative acceleration?

8. Answer Problem #4
4. Lines A and B show positive acceleration.  Line C shows that you are slowing down and thus acceleration would be a negative number.

9. Motion Exam Review Problem #5
5. A bullet train covers 354 kilometers in 2 hours. What is its average SPEED?

10. Answer Problem #5
S = ?     D = 354 km    T = 2 hr S = D / T S = 354 km / 2 hr S = 177 km/hr

11. Motion Exam Review Problem #6
6. Sara covers 46 meters on her skateboard in 4 minutes.  What is her SPEED?

12. Answer Problem #6
S = ?     D = 46m    T = 4 min S = D / T S = 46m / 4min S = 11.5 m/min

13. Motion Exam Review Problem #7
At what SPEED is a plane traveling if it covers 1,786 kilometers in 1.5 hours?

14. Answer Problem #7
S = ?      D = 1786 km      T = 1.5hr S = D / T S = 1786 km / 1.5 hr S = km/hr

15. Exam Review Force An object with a balanced force has no motion
A object with an unbalanced force results in a motion of that object

16. Calculate the Net Force

17. Calculate the net force and direction

18. Calculate Net force and direction
Two horses are pulling on a person in opposite directions. The horse on the right pulls with a force of 75 N. The horse on the left pulls with a force of 92 N. What is the total net force and the direction of movement?