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17 27 I Ir = 3 m, L? T= 21 mg Lim How do these two equations explain why a simple pendulum is defined as a point mass @ the e How do these two equations explain how a simple pendulum is defined as a point mass at the end of the length of negligable mass?
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In both of these formulas,we take L as the length of pendulam,which basically means,distance between point of suspension of pendulam to centre of mass of the bob.If bob is not considered a point mass,we need to find its centre of mass and add it to the length of the rope.This makes our calculations and experiment more prone to errors.Hence simple pendulam's bob is considered as a point mass and length of the rope is taken as length of pendulam to avoid errors and we may focus on our experiment.

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