observe the second hand in a watch.What can you say about its speed and velocity?
please help me!
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Answered by
1
Answer:
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Answered by
0
Answer:
0.21 cm/s
Explanation:
Angular speed of second's hand
ω=
revolution time(in sec)
2π
Revolution time of second's hand =1rev/min=1rev/60sec
⇒ω=
60sec
2π
So the speed of tip of the hand is given by
⇒v=rω=2cm×
60sec
2π
≃ 0.21cm/sec
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