The 4.5 cm long second hand on a watch rotates smoothly. What is its angular velocity? What is the speed of the tip of the hand?

Angular velocity means how many radians/degrees is this hand passing by every second.First, you realize it goes through a whole revolution (2[tex] \pi [/tex] in radians) in 60 seconds.This means for every second, it passes by:[tex] \frac{2 \pi }{60 s} = 0.105 \frac{rad}{sec} [/tex]For the next part, you need to know this equation:Tangential velocity=Angular velocity x radius (meters)[tex]velocity=0.105 \frac{rad}{sec} *0.045m[/tex][tex]velocity=0.004725 \frac{meters}{sec} [/tex]