In a traditional wall mounted clock, the second hand makes one revolution in 60.00 s. The length of the second hand is found to be 6 cm.

Question

1. In a traditional wall mounted clock, the second hand makes one revolution in 60.00 s. The length of the second hand is found to be 6 cm.
2. What is the speed of the end of the second hand?
3. What will be the speed at a point midway on the second hand?

Answer 1

The period of revolution is T = 60.00 s, and circular speed is v = 2π r/ T.

a) The circumference marked out by the tip of the second hand is 2π r = 0.3770 m with r = 0.06 m, and v = 0.006283 m/s (0.6283 cm/s).

b) The appropriate radius is now r = 0.03 m and v = 0.003142 m/s (0.3142 cm/s).