Question

the tip of seconds hand of a clock takes 60s to move once on circular dial of the clock. if the radius of the dial of the clock be 10.5cm, calculate the speed of the tip of the seconds hand of the clock

Answer 1

Hey there !!!!!

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Tip of seconds hand of the clock covers the circumference of the clock which is circular in shape.

So distance covered =2πR = 2π*10.5 = 66cm =66/100 =0.66m

Speed =distance/time = 0.66/60 = 0.11 m/s

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Hope this helped you..................    

Answer 2

The tip of the second's hand will cover the circumference that is 2πr

2×3.14×10.5

=66 cms and it takes 60 seconds to complete it and hence 66/60 is 1.1 cm/s