The second's hand of a watch is 2cm long. What is the speed of this hand?
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circumference of the circle made by the second hand = 2πr= 2 x 22/7 x 2 = 88/7 cm
distance travelled by the tip = circumference
= 88/7
total time taken = 60 sec
Speed = D/t
= 88/420
= 22/105 cm/sec
distance travelled by the tip = circumference
= 88/7
total time taken = 60 sec
Speed = D/t
= 88/420
= 22/105 cm/sec
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