A gerbil travels in the path indicated in the figure above in 20 seconds. Findthe gerbil's:

1. total displacement

2. distance travelled.

3. average velocity

4. average speed

Below is the motion diagrams for two different objects C and D. Clock readings are indicated in the boxes.

5. Which is travelling fastest to begin with?

6. Which travels the greatest distance ?

7. At which clock readings(instants) do they occupy the same location at the same time?

8. Is there any time interval over which they have the same average velocity?

9. Draw a motion diagram on the reference frame below for a cat moving with positive acceleration and negative velocity.

10. Find the total displacement traveled in 8 seconds by the object with this velocity vs time curve.

11. Use complete sentences to describe the motion of the object with the velocity vs time curve in 10.

12. Draw the acceleration vs time and displacement vs time (assume the object starts at the origin ) graphs for the object with the velocity vs time graph in problem 10.

13. The graph below shows the position vs. clock readings of the motion of two trains running on parallel tracks.

Which of the following is true: Circle the all correct statements.

A. at time tB both trains have the same velocity

B. at time tB both trains have the same position

C. both trains speed up all the time

D. both trains have the same velocity at the same
time for some time before tB

E. somewhere on the graph, both trains have
the same acceleration

For problem 14 below, here's how you get paid:

Draw picture -1 point

Draw reference frame -1 point

Draw motion diagrams for the object over each time interval (if different) to determine signs for velocities and accelerations. -1 point

Indicate with A, B, C, etc, the pertinent events. -1 point

Write down x, v, and t values for each object at each of these positions, and acceleration between them. Include equations where appropriate -1 point

Solve the problem -2 point

14. Martha is riding in a hot air balloon, rising at a constant 5 m/s. George watches nervously from the ground. At 30 m according to her altimeter, she releases a bouquet of flowers for George to catch. How long does it take the flowers to reach George?

10 point BONUS QUESTION: Draw a diagram for a ball depicting the motion described:

its speed decreases and acceleration increases