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II. Motion Diagrams - plots of motion data

 

Detailed, visual way of describing motion

 

Both plots show an increasing displacement

Describe the velocity for each.




Constant Velocity


Increasing Velocity

 

 

A. Displacement vs. Time Plot

 

Ex)

(d) Displacement (m)


Calculate the Velocity
from 2 to 4 sec

  V = ∆d/∆t  

 

= (10. m - 5.0 m)/(4.0 s - 2.0 s)

 

= +2.5 m/s

 

Slope = ∆y/∆x

= ∆d/∆t = Velocity

 

(d) Displacement (m)

1. Constant Positive Velocity

2. Constant Negative Velocity (backwards)

 


Slope of a d vs. t graph =
velocity

 


Describe the various motions shown in this plot

A to B?

Constant Velocity

 

 

 

B to C?

 

 

Increasing V,
then Decreasing V

 

 

D?

 

 

 

Rest

 V = 0

 

 

 

D to E ?

 

 

 

Increasing V

 

 

 


 

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