First slide

Periodic Motion

Question

Three simple pendulums have lengths of strings 49 cms, 48 cms and 47 cms with diameters of the bobs 2 cms, 4 cm and 6 cm respectively. Then their periods are in the ratio

Easy

A

1 : 1 : 1
B

1 : 2 : 3
C

3 : 2 : 1
D

51 : 52 : 53

Solution

Tα√l where l is length of the pendulum from point of suspension to centre of the bob
l=x+r

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