The 1.00 cm long second hand on a watch rotates smoothly. (a) What is its angular velocity? (b) What is the speed of the tip of the hand?

NetherCraft 0

Please HELP ME WITH THIS.

and also PLEASE EXPLAIN IT as you can.

I don’t understand this angular velocity,acceleration etc. so nicely.

1 Answer

  • a)

    Angular velocity w = angle(radians)/time(sec)

    For a second hand, the angle is 2π radians and the time is 60 sec;

    w = 2π/60 =0.1047 rad/sec

    b) Vtip = w*r = 0.1047*1.0 = 0.1047 cm/sec

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