The sweeping second hand on your wall clock is 24cm long.

a) What is the rotational speed of the second hand? b) Find the translational speed of the tip of the second hand.

c) Find the rotational acceleration of the second hand.

A. the rotational speed of the second hand is 2pi per 60 seconds.

rotational speed (w) = 2pi / 60 s = pi / 30 per second

b.) the translational speed of the tip of the second hand (v) = rw

v = 24 cm (pi / 30) per second

v = 2.51 cm / s

c. the angular acceleration is zero because the second hand angular speed is constant.