lab 4 Air resistance

Purpose: The purpose of this lab is to determine the relationship between air resistance force and speed.

Formula: F(air Resistance)=kv^n

Tools: we used logger-pro to record the coffee filters falling from the second floor of the tecnology building. 

To the left we have different  group members releasing the coffee filters off of the second floor.

While the filters were falling other group members recorded their motion using logger pro. 

This is a picture of group members recording the motion of the filters.

Note: Five different trials were done, groups started with one filter and ended with five.

Back at the lab we created a position vs. time graph. We did a linear fit on the position vs time  graph to get the slope , the slope of the graph represents the final velocity of the coffee filters.

Trial 1: 1 coffee filter- terminal velocity= -.8164 m/s

Trial 2: Two coffee filters Terminal velocity= -1.216 m/s

Trial 3: 3 Filters Terminal velocity= -1.650 m/s

Trial 4: 4 filters Terminal velocity=-1.865 m/s

                                          After we found our velocities we created a force vs. velocity graph to get our values of K and n.



Spread sheet is to the left.

To the right we have the proportional fit Force vs. Velocity graph.

K= .01279

n= 2.042

F(air resistance)= .01279 v^2.042