Wood-Wood Static and Kinetic Friction Coefficient

 Data was collected by Jessie, Zani, Gian, and Kendrick.

The graph was made in Desmos by Kendrick.

Distance vs. Time in Accelerated Motion

 

Graph by De'sirae based on data collected in class

According to the equation of accelerated motion, d₀ = at²/2 + v₀t + d₀,
the parameters of motion are:

• Acceleration a = 0.11 m/s²
• Original velocity v₀ = 0.24 m/s
• Original distance d₀ = 0.40 m

Displacement vs Time in Uniform Motion

 The slope of the line above represents the velocity (v = 1.08 m/s). What does the intercept represent? Answer in the comments section below.

Friction Coefficients

Congratulations, Emma, Evan, and Jeffrey! The accepted value of the wood-cork static friction coefficient is 0.5, and you got 0.498598, or 0.500.  Good job! (Graph in Desmos by Jeffrey)

Static and Kinetic Friction Coefficients

 The accepted value of the wood-wood static friction is between 0.25 and 0.5, and you got 0.26.  

Way to go, Anh, Mariama, and Alexa (graphed in Excel).

Electric Field vs. Distance

(by Nicole)

Electric Field vs Distance

(by Amanda)

One more attempt to graph displacement vs time

Both graphs are done by Lenicha in Excel. Good job! 

Just one observation.  In the graph below, points are precisely placed on a parabola (trendline option of a second-degree polynomial).  That suggests a question about the graph above, which presents quite scattered points.  The only reasonable explanation is in the launching method; the launcher equipped with a rubber band might not be the best solution.  

Both graphs present a good start-point for further discussion in class. 

Projectile Motion: Range and Max. Height vs. Launch Angle

Projectile Motion: Range and Max. Height vs. Launch Speed

Velocity in Uniform Motion

The graph was done in Excel 2010. Notice that all the point are exactly aligned, which means that the air track was perfectly leveled.

Image distance vs. object distance, f = 10 cm

Data collected by Zuzan and Tim

Link to the graph

x = 10        y = 10        1/x + 1/y = 1/10

Link to the graph

Image distance vs. object distance; f = 25 cm

Data collected by Melissa and Naomi

Link to this graph

1/x + 1/y = 1/25        x = 25        y = 25

Link to the graph

A toy-car speed

 

Even a small toy-car can be a good source of data. See the results:

(Graph by E&A)

Distance in accelerated motion

The air track is elevated (see its right leg in the picture), so the observed motion is accelerated due to gravity. Two photogates allow to measure the time needed to move between them with high accuracy. In our experiment the second photogate was placed each time 10 cm farther to the left (see the data below). 

(Graph by Tim)

Speed in accelerated motion

The photogate measures time of the glider passing through. To calculate its speed, use the length of glider's flag. Moving the photogate farther allows to measure the increasing glider's speed:

v = l / t

l = 10 cm = 0.1 m.

(Graph by Tim)

The graph shows that speed increases at the same rate.

Uniform motion

This setup was used to determine the change in position of the glider in time in the uniform motion. Below there is a graphical representation of the findings.

The graph was done in Excel. Slope of the regression line represents the actual speed of the glider.

(Zuzan's work)