Using d-t, v-t, and a-t graphs

Today we'll be starting with a motion detector and the Logger Pro. Complete the d-t graph and the v-t graph for each of the three scenarios presented.

 Then, head to the Moving Man Simulation found at PHET by clicking the link below:

Click to Run

CLICK ON THE CHARTS TAB

• For trial 1, enter in the following values: x=0, v=0, a = +1
  
• For trial 2, enter in the following values: x=0, v=0, a = -1
  
• For trial 3, enter in the following values: x=0. v=0, a = -1
  

The graphs in simulation should mimic what you have in logger pro, but with one difference: the a-t graph is valid. Logger pro is not good at generating a-t graphs using a motion detector. Discussion questions to consider   include:

1. What would a dot diagram look like for each of the situations? Be sure to mark zero.
2. Are you able to calculate the slope of the d-t or v-t graphs? Why or why not?
3. What's the difference between a slope of an interval and a slope of an instant?
4. How could you calculate the slope of an instant? Explain.
5. What does the area under a v-t or a-t graph tell you? Explain?