A person in a rocking chair completes 12 cycles in 21 s What

A person in a rocking chair completes 12 cycles in 21 s. What ire the period and frequency of the rocking?

Solution

Time taken to complete 12 cycles = 21 s

Time taken to complete one cycle = 21s / 12

                                                  = 1.75 s

i.e., period of rocking T = 1.75 s

Frequency of the rocking f = 1/T

                                      = 1/1.75

                                      = 0.5714 Hz