Physics Cantilever Lab

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Independent Assessment Physics Lab (SL): Cantilever Flexion
Cherno Okafor
Mr. Ebrahimi
October 21st, 2012


Purpose: The purpose of this Physics Lab is to investigate what factors determine the amount of flexion of the cantilever. Hence, the objective is to establish a relationship between the length of a cantilever, which may give some insight into the physics of cantilevers.

Hypothesis: If one increases the length of a cantilever, one would expect there to be an increase in deflection/flexion of the cantilever. Similarly, if one increases the mass of the load, one would expect there to be an increase in the deflexion/flexion of the cantilever. In addition, I predict that proportionality will also occur between the independent and dependent variables. If the length of the cantilever doubles, it is expected that the flexion/deflexion would also double. Similarly, if the mass of the load doubles, the deflexion/flexion would also double.

Variables: In this investigation, I chose two variables: the length of the cantilever and the mass of the load. First, I chose to measure the effect of the length of the cantilever on its deflection when loaded with a constant mass because I knew from prior experience that there was some relationship between the two variables. * Independent Variable: The length of the cantilever in metres, which will be varied by changing the length of the yardstick functioning as a cantilever that extends over the edge of a table. This will be measured indirectly by measuring the length of the portion of the yardstick not in use and subtracting that from the entire length of the yardstick. The other independent variable is the mass loaded onto the cantilever, which will be controlled by initially using the same mass for each trial, then for the second part, changing the mass of the load by increasing and decreasing the mass, and subsequently investigating what the relationship is between load mass and...
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