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प्रश्न
A pendulum swings through an angle of 30° and describes an arc 8.8 cm in length. Find the length of the pendulum.
उत्तर
Given:
Length of the arc = 8.8 cm
And,
θ = 30°
Now,
Length of the arc` = (2pi"r"theta)/360`
`=> 8.8 =(2xx22/7xx"r"xx360)/(360)`
`=>"r" = (8.8xx360xx7)/(44xx30)`
∴ r = 16.8 cm
Length of the pendulum = 16.8 cm
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