the second's hand of a watch is 2 cm long.the speed of the tip of the hand is________
Asked by sabreen | 23rd Jul, 2013, 07:52: PM
we know that speed=distance / time.
distance travelled by seconds hand is 2*pi*r( circumfrence)
n time =60 seconds to complete the circumference of watch.
so speed =2* pi* 2/60 cm/sec
Answered by | 23rd Jul, 2013, 09:31: PM
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