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Question
Find the angle in radian through which a pendulum swings if its length is 75 cm and the tip describes an arc of length
21 cm
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Solution
We know:
Radius = 75 cm
Length of the arc = 21 cm
Now,
\[\theta = \frac{\text{Arc}}{\text{Radius}}\]
\[ = \frac{21}{75}\]
\[ = \frac{7}{25}\text{ radian}\]
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