Question

observe the second hand in a watch.What can you say about its speed and velocity?


please help me!​

Answer 1

Answer:

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Answer 2

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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