Question

A pendulum makes 15 oscillations in 5 seconds what is the frequency of the pendulum.

Answer 1

Answer :

In 5 seconds pendulum makes = 15 oscillations

In 1 second pendulum makes   = 15/5

                                                    = 3 oscillations

Thus the frequency of this pendulum is 3 oscillations per second or 3 hertz

                                                                                                                   

Answer 2

Given that 40 oscillations are made by the pendulum for 4 sec. So, It makes 10 oscillations are made by the pendulum for 1sec. We know that the number of oscillations made per second (10 oscillations per second ) is called its frequency ∴ Frequency = 10 Hz Time period = 1/ Frequency Time period = 1/ 10 Time period = 0.1 sec