If At First You Don't Succeed, Try, Try Again

Today was basically the first day we started kinematics or in other words the motion unit. Mr.Chung had divided us in 7 groups and I was chosen as the leader. My job was to setup the equipment and explain to my group members what we were suppose to do and how. They got the hang of it pretty fast! The objective of the activity was to match our walking patterns to the pattern of the distance-time graphs or velocity-time graphs using a motion detector.

The result for graph B

  A. Stand at 1m away from the origin and stay at rest for 1s
  B. Jog 1.5 m [E] away from the origin in 2s at a constant speed
  C. Stand 2.5 m away from the origin for 3s
  D. Jog 0.75 m [W] toward the origin in 1.5s at a constant speed
  E. Stand at 1.75 m away from the origin and stay at rest for 2.5 s

The result for graph C

A. Start at a distance of 3 m away from the origin and jogs 1.5 m [W] toward the origin in 3s at a constant speed
B. Stand 1.5 m away from the origin and stay at rest for 1s
C. Jog 1 m [W] toward the origin in 1s
D. Stand 0.5 m away from the origin and stay at rest for 2s
E. Jog 2.5 m [E] away from the origin in 3s 

The result for graph D

A. Stay at a velocity of 0 (rest) for 2s
B. Speed is increased to 0.5 m/s [E] during 0.1 s
C. Speed of 0.5 m/s [E] is maintained for 2.9 s
D. Object quickly speeds up in 0.1 s at 0.5 m/s [W]
E. Stay at a velocity of 0 (rest) for 1.9 s
F. Speed is increased to 0.5 m/s [W] during 0.1 s
G. Speed of 0.5 m/s [W] is maintained for 2.9 s

The result for Graph E

A. Increase to a speed of 0.5 m/s [E] going away from the origin for 4s
B. Maintain speed of 0.5 m/s [E] for 2s
C. Speed is at 0 m/s [W] during the 0.1 s
D. Maintain a speed of 0.4 m/s [E] for 3.9 s
E. Speed up for 0.1 s at a speed of 0.4 m/s [E]
F. Stay at a velocity of 0 (rest) for 0.9 s

The result for Graph F

A. Stand about 0.8 m [E] away from the origin and jog 1m away from the origin for 3.5 s
B. Stand 1.8 m [E] away from the origin and stay at rest for 3 s
C. Jog 1.5 m [E] away from the origin in 3.5 s

Some things to know:

D-T Graphs (B,C, F)
-If the slope is inclining, walk away from the origin
-If there is no change in the line (slope of 0), stay still
-If the slope is declining, walk toward the origin
-The speed at which you have to walk depends on the time you have to walk it in

V-T Graphs (D, E)
-If there is no change in the line (slope of 0), the speed is constant
-If the velocity is at 0, there is no movement
-If the line inclines or declines, there is an indication that the speed is changing

Reading D-T or V-T graphs can be quite confusing. Therefore, you should carefully analyze the graphs.