Conclusion:
Answer the following questions in your own words while thinking about the activity you just completed. (You draw a picture to help explain your answers.) i. Describe/define position.
Describe/define velocity:
3. What is a vector?
4. How are position and velocity related?
Describe how the man could have positive position while having a negative velocity.
6. Describe how the man could have nesative position while havin8 a positive velocity.
7. Describe how the man could have positive position while havin~ a positive velodtT.
Describe how the man could have negative position while having a negative velocity.
Schiller/Barton Physics, Created Fall 2011

- Remember graphs are not just an evil thing your teacher makes you create, they are a means of communication. Graphs are a way of communicating by using pictures and since a picture is worth a thousand words knowing how to make and interpret graphs will save you a lot of writing. (~
Develop a general kqowledge of "Ve!ocity vs. Time" graphs and
"Distance vs. Time":graph~ o What graphs of a person standing stil! would look like o What graphs of a person moving away from an observer at a constant speed would look like.
o What graphs ofaperson moving towards an observer at a constant speed would look like.
~ o How differences in speed appear on the graphs
Procedure - Do tile following activity using this web site http://www.colorado.edu/physics!pheVsimulations-base.html
Then click on "The Moving Man"
Screen 1
1.
Getting started. After~"The Moving Man" is open leave the position graph and the velocity graph open but close the acceleration graph. Your screen should look like screen 1.
2. Making observations. By either clicking on the man or the slider cause the man to move back and forth and observe what shows up on the graphs. Using the axis provided below make sketches of
Distance vs. Time and Velocity vs. Time graphs for the actions described next to each axis.
A man moving from 0 to !0 at a slow steady pace.
-i0 -I0
C~)
A man moving from 0 to 10 at a fast pace.
~5
...
~-5
-10
A man standing still at
1o
~-5
-i0
(s)
~-5
-10
(s)

lO
-5
-lO
A man moving from 0 at a slow pace.
~ 5 to 10 at a fast pace
~ o the moving back to 0 E-5
-lO lO
K5 to -10 at a fast pace ~ o the moving back to 0 E-5 at a slow pace.
-!o
lO io
A man moving from 10 ~ 5 to 0 at a fast pace.
~ 0
-lO ~io
Apply what you learned. Look at the Distance vs. Time graph below and for the different parts of the graph that are marked by the dotted lines make the corresponding Velocity vs. Time graph dir.ectly
below each part.

velocity

Velocip! Graph Practice
At what time(s) during this graph is the vehicle standing still?
During which time period does the vehicle experience the greatest acceleration?
~5
When are brakes being applied?
Describe, the motion of this vehicle from t=0 to t=40 seconds.

Do the following for each of the situations below: a. Move, relative to the motion detector, so that you produce a position vs. time graph (or velocity-time ........
~aph) wMch closely approxflnates ~he graph shown.
b. h~ tJ~e space provided, desmJbe how you must move in order to produce the position vs. time graph shown in the space to the fight,pf the velocity vs. thne graph. Be sure to include each of the fo!Ioydng in your description: stinting position, direction moved, type of motion, reladve speed.
o. On the velocity vs. time axes, sketch He velocity vs. time graph which corresponds to thg position vs.
time
Position vs. Time Velocity vs. Time Written Descriptiott .
time~

7
11
12
9
10 tim~~" ,~
." ~ l ti m~~" time~"
---__L
[ tima~"
~im~~" t time~’
~?}--.,-, ~o~ b~.~k ~;i0,~i-/
~e9 ~-,~ Sloff,
4no,u~ ~-,~,-’~
~Io-,I,/ tKo.~ q~,d4~