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# Physics II Lab w answers_Part_6 - k and g from this graph...

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23 12 2 2 2 b l k + = (5) where l & b are the length & breath of the bar respectively. Experimental Procedure: 1. Determine the center of mass (CM) by balancing the bar on a knife-edge. Measurement of d is made from this point to the point of suspension for each hole. 2. Suspend the bar by means of knife-edge. 3. Focus the telescope on to the marker marked on the pendulum. There should not be any parallax between the image of the marker and the cross wire in the eyepiece of the telescope. 4. Measure the time for 10 to 20 oscillations for different d (only on one side of CM). Repeat each observation several times. Plot T Vs d . Calculate

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Unformatted text preview: k and g from this graph. Plot T 2 d Vs d 2 . Using linear regression technique fit the data and determines k and g from it. Estimate maximum possible error in g. 24 Experiment 3 Bar Pendulum Observations and Results Least count of the measuring scale used = …………………. Least count of the stop watch used = …………………. Table I S. No. Distance from CM of axis (d) in cm No. of oscillations (n) Time period for n oscillations (Tn) Time period (T) for 1 oscillation (Tn/n) T 2 d d 2 1 (i) (ii) (iii) 2 (i) (ii) (iii) 3 4 5 6 7 8 9 Calculation: T min from the graph =….at d=…… At T min , d=k=…...
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Physics II Lab w answers_Part_6 - k and g from this graph...

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