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Answer:(1) 9.5 cm
Explanation:
Given :
The linear speed of the second hand = 1 cm/s
To find :
The length of the second hand .
Solution :
The second's hand covers 2π rad in 60 seconds .
The angular speed of the second hand = 2π / 60 rad/s
radius or length of the second hand = ( linear speed ) / ( angular speed )
=> length = 1 * 60 / 2π
=> length = 9.5 cm ( approx. )
The length of the second hand is nearly 9.5 cm .
hope it helps:)
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