Question

the pendulum of a grandfather clock is 1.3m long. Determine the length of the arc through which the pendulum moves if it moves through an angle of 15

Answers

circumference of the potential whole circle = 2π(1.3)
= 2.6π

so , by a simple ratio

arc/2.6π = 15/360
arc = 2.6π(15/360) = (13/120)π or appr .34 m
or 34 cm

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