centripetal force
...quency are all measured values which F theory depends on. The F hanging is calculated using F hanging = m g. In the hanging procedure; m, mass, must be the total mass required to stretch the spring the radial distance observed. The value for F hanging is then plotted against f2 and theoretically the slope should equal 4 mr. RESULTS Overall results yielded a 35.3% difference between the experimental value for Fc and the value for frequency squared. In this procedure, five different tension settings were used. The frequency was measured, or, calculated for each setting. The total hanging mass for each tension setting was also taken and results are shown on the datasheet. The centripetal force, from the spin, is compared to the force as obtained from calculating mass x gravity. The greatest difference in Fc between the experimental value and the theoretically value was a -7.7 % and -6.5% difference respectively, shown at the two highest revolutions, or tension settings. The greatest difference between experimental and theoretical values can be attributed to random errors as: human error in varying the pressure used to adjust the rotating speed of the apparatus to maintain the needle alignment, the human judgement call in when the needle was actually aligned correctly, the communication between the person adjusting the speed and the person viewing the position of the needle, as well as catching any miscounts in the counter. Viewing the position of the needle was most difficult and depended upon the eyesight of the viewed as well as their judgement. Measurement of the hanging mass also introduced systematic error from the inaccuracy of the ruler the spring scales use in this measurement. Random error was also introduced in the timing, since we used the clock on the wall and human judgement was used to determine the 60 second reading, and systematic error if the clo...