Question

An object is spun around in circular motion such that its frequency is 12 Hz.

Answer 1

Explanation:

Given parameters:

Frequency  = 12Hz

Unknown:

a. Period of its rotation

b. Time required to complete 86 rotations

Solution:

Frequency is the number of times of rotation per unit of time.

  Frequency  = $\frac{n}{t}$  

Period is the opposite of frequency;

          Period = $\frac{1}{12}$   = 0.083s

b. Time for 86 rotations;

          Since frequency  = $\frac{n}{t}$  

n is the number of rotation

t is the time

             t  = $\frac{n}{Frequency}$  = $\frac{86}{12}$   = 7.2s