Question

A bob hung from a simple pendulum oscillates 20 times in 15 sec. Calculate (a) the frequency (b) the period of oscillation.​

Answer 1

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Simple Pendulum is a very small heavy metal bob suspended at a point from a firmly fixed support using a single strand thread so that it oscillates freely. The distance between the point of suspension and centre of bob is called the length of the pendulum. 

One oscillation: One complete to and fro motion of the oscillating body is called one oscillation. 

Frequency: It is the number of oscillations made by the body in one second.

Time Period: It is the time taken by a body to complete one oscillation.

Hence, the Frequency and Time period are calculated as follows.

Time period = Time taken by the pendulum/Number of oscillations made by the pendulum.

20/10

=2s

Frequency =1/Period

½

=0.5Hz

Hence, the Time period and frequency are 2 seconds and 0.5 Hertz respectively.

Answer 2

Answer:

Simple Pendulum is a very small heavy metal bob suspended at a point from a firmly fixed support using a single strand thread so that it oscillates freely. The distance between the point of suspension and centre of bob is called the length of the pendulum.

One oscillation: One complete to and fro motion of the oscillating body is called one oscillation.

Frequency: It is the number of oscillations made by the body in one second.

Time Period: It is the time taken by a body to complete one oscillation.

Hence, the Frequency and Time period are calculated as follows.

Time period = Time taken by the pendulum/Number of oscillations made by the pendulum.

20/10

=2s

Frequency =1/Period

½

=0.5Hz

Hence, the Time period and frequency are 2 seconds and 0.5 Hertz respectively