Determine the angle trhough which the pendulum swings

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Oct 16th, 2017

Use Law of Cosines

Let P = angle through which the pendulum swings

9.6^2 = 100^2 + 100^2 -2(100)(100)cosP

92.16 = 10000 + 10000 - 20000cosP

20000cosP = 20000 - 92.16

cosP = 19907.84 / 20000 = 0.9954

P = arccos(0.9954) = 5.5 degrees


Feb 3rd, 2015

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