Question

A pendulum swings through an angle of 22 degrees each second. If the pendulum is 30 inches long, how far does its tip move each second?

Answers

We need to find the arclength of a central angle of 22°

let's use a ratio
arc/(2π(30)) = 22/360
arc = 22(60π)/360 = appr 11.5 inches/sec

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