Question

The minute hand of a watch is 2 cm long. What is the speed of its endpoint!​

Answer 1

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