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# We use spherical pendulum bob because

$(a)\;\text{it has least volume} \\(b)\;\text{it has least air friction}\\(c)\;\text{it has least material}\\ (d)\; \text {easy to measure biameter}$
Can you answer this question?

As the pendulum bob swings it has least air friction.
Hence b is the correct answer.
answered Mar 18, 2014 by

+1 vote