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Question

The speed of the tip of a second hand of length 5 cm of a clock is _________ m/s.

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Solution

Step 1 . Calculating circumference of clock

Circumference of the clock = 2πr=2×227×5=31.41 cm

(As 5 cm is the radius)
It has to cover the circumference in 60 seconds.
Step 2 . Calculating speed of second hand

Therefore speed = DistanceTime=31.4160=0.52 cm/s=0.0052 m/s.


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