CHEM 2OD3 Chapter Notes -Circular Motion, Net Force, Centripetal Force
16 Nov 2014
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Document Summary
Since frequency is directly proportional to the square root of the net centripetal force, while keeping mass and radius constant, the increase in net force should result in a higher frequency as well. Control variables: radius of rotation, mass of rubber stopper. Materials: mass balance, stopwatches, metre stick, string, 17. 73g rubber stopper, retort stand, force sensor. Not all experiments had 4 trials as on certain experiments one of the timers had an error or was not ready to record, thus some experiments have 4 trials and others have 3. In addition the error for revolutions is 1 revolution. In the experiment using 3 newtons of force, the calculated uncertainty ( 0. 17) is less than the predicted uncertainty ( 0. 20), thus the higher error is used in order to side with area of caution. For remaining log centripetal forces and log frequencies, see table below. From the graph: y= 0. 3882x + 0. 2041 m (slope of the line) = exponent (n)
