FreeFall

The #1 Misconception in All of Physics (or any subject)

Gravitational Field Strength on Other Solar System Bodies

Same Size Different Masses:

How will you use your phone to record the time it takes for each ball to fall?

Using your group data, create an INDIVIDUAL C.E.R. to describe the relationship between the mass of the ball and time to fall, while keeping the surface area constant. Submit you CER in the Google Classroom Assignment: Same Size Different Masses.

Graphing Your Data

Find the average of data.

2. Insert a Chart

Select non-continuous data by using the COMMAND key.
Select the first column, press and HOLD Command, select second column.

3. Add a Trendline

4. Add Titles and Axis Labels

A Graph of Mass of Tennis Balls v. Time Fallen

The Slope of the graph is 5.71x10^-5 (0.0000571 s/g). This may be considered insignificant.

The y-intercept of the graph is 0.439s. This value is less than 1% from the expected value based on the 0.90m height the tennis balls were dropped from.

The R^2 value is 0.009. This value indicates the correlation between the two variables. A value of 1.000 is perfect correlation, where as a value of 0.000 is no correlation.

Terminal Velocity Variable Map

The model that you have created from your data is somewhat limited. The tennis balls are all the same size, texture, and fall from a short distance. The model you have created has limited cases where it can be used.

Your challenge is to create a Variable Map to show which additional variables PLUS how they could be quantified.

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