Loading...
unit length on the frequency of a vibrating string or wire Practical activities have been safety checked but not trialled by CLEAPSS Users may need to adapt the risk assessment information to local circumstances Sample data At a constant frequency of 56 Hz ? 2 0 A graph of T against ?2 gives a value for µ of 3 4 gm–1 T/N ?/m 1 0 0 277
In Part B use the wave driver to vary the frequency but keep the length and tension constant Use DataStudio or ScienceWorkshop to control the frequency of the wave driver Plot a graph of frequency vs n to determine the linear mass density of the string Compare the values of linear mass density for all three methods SAFETY REMINDER •
4 Make a table containing the quantities Tension, Wavelength, and Wavelength Squared 5 Plot a graph with Wavelength Squared on the vertical axis and Tension on the horizontal axis Using a straightedge, draw the straight line which best represents the plotted points and passes through the origin Is the graph linear, within experimental error?
6 Read the value of the tension off the PC or calculator attached to the force sensor 7 Record the tuning fork frequency and the tension of the wire in the table 8 Repeat steps 3 – 7 for every tuning fork 9 Plot a graph of frequency f against T Note A short length of drinking straw can also be used as a very light rider Slit the
5 Increase the value of the tension (in steps of 4 N, for example) and again increase the applied a c frequency until resonance occurs 6 Record the frequency and tension values in a table 7 Repeat the procedure to obtain at least six readings 8 Plot a graph of frequency f against the square root of tension T Draw a straight
the standing wave and the tension in the string along with the frequency of oscillation of the string Introduction: When a stretched string is plucked, it will vibrate in its fundamental mode in a single segment with nodes on each end If the string is driven at this fundamental frequency, a standing wave is formed Standing waves also
density3, ?, and the tension, T Using a setup similar to Fig 10 2 the string is put under tension by running it over a pulley and hanging a mass on the end The tension, T, is then given by T = mg (10 5) Knowing the amount of tension T and the string’s density ?, the speed c of the transverse wave can be found from: c = s T ? (10 6)