Question

4. Non-digital clocks (which are becoming more rare) have a second hand that rotates around in a regular and repeating fashion. The frequency of rotation of a second hand on a clock is _______ Hz

Answer 1

The second hand rotates at the rate of f = N / 60 sec

where N represents the frequency of rotation of the second hand

If the second hand rotates once in 60 sec then f = 1 / (60 sec)