# Physics II Lab w answers_Part_5 - Coupled Pendulums...

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21 Coupled Pendulums Observations and Results Mode 1 Mode 2 Position of spring from pivot l (cm) Time(sec) (for 20 oscillations) Period T 1 (sec) Angular frequency 1 (sec -1 ) Time(sec) (for 20 oscillations) Period T 2 (sec) Angular frequency 2 (sec -1 ) Table of Observations for Part B Position of spring l = __________________ cm (Note that this has to be one of the values Chosen in PART A) S.No Time period between successive oscillations T (sec) Time period between successive stops ± T (sec) Average T (sec) Average ± T (sec) Angular frequency ± ² ³ ´ µ Δ - = T T 1 1 2 1 ² Angular frequency ± ² ³ ´ µ Δ + = T T 1 1 2 2 ² 1 2 3 Calculations and Graph 1. On the same graph paper plot 1 2 / & 0 2 and 2 2 / & 0 2 vs. l 2 . 2. Obtain the slope of the graph of 1 2 / & 0 2 vs. l 2 and hence obtain the spring constant k of the coupling spring Slope = 2 k / (mgL) = _____________________ Spring constant k = _______________________dynes / cm Conclusions: (One graph paper required).

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Physics II Lab w answers_Part_5 - Coupled Pendulums...

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