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IVITY NO. 2, ACTIVITY N 3, SECOND’S PENDULUM, , . z . seconds pendulum, Aim : To determine the length of the seconds pend (stand, meter scale, stop watch, Vernier, Apparatus : Metal sphere (bob), inextensible string, retorts, calliper, , Diagram : HALLLLLLL, Wish suppor, , Extreme, B Postion, , mgcos0, , , , Formula:, , Ly _ Dy L Le =4 #], BR 4 -(4 con AT? I cen, Procedure:, , I. Suspend the bob (radius given) from the fixed support of a retort stand by means of inextensible, string, , Adjust the length of the string to 80 cm., , Displace the bob to its equilibrium position and release, so that it performs linear $.H.M., Measure the time (t) for 20 oscillations., , Record the observation for two sets of oscillations., , Hence find the time period T = t/20 (seconds)., , Repeat the steps 4 to 7 by adjusting the lengths of the string 90 and 100 cm., , NAM Rw, , Observations:, Radius of the bob = N28. cm, Period of second’s pendulum T, =2 sec, , Observations for period oscillations T : Period, , , , , , , , Obs. Length of | Length of the] Time for 20 osai =, , : ; Peet cillati = t, , No. |thestring| pendulum - t see eo T= 20 a se, ee sec TS, , , , , é€cm L=(é +1) em, , , , , , , , , , , , , , , , , t(sec), ! 890] 91.28 3B a, Z 96100} lon7g 3 S38 [pg [2528, 3 0110) 111-28 4o 9 iasae, , , , , , , , , , , , , , , , , , , , , , 42 Tan ke23, , mean= Lo , cm s?, , , , scanned with Camscann