   # Determine the natural frequency of a pendulum whose length is 15 ft. ### Engineering Fundamentals: An Intro...

5th Edition
Saeed Moaveni
Publisher: Cengage Learning
ISBN: 9781305084766

#### Solutions

Chapter
Section ### Engineering Fundamentals: An Intro...

5th Edition
Saeed Moaveni
Publisher: Cengage Learning
ISBN: 9781305084766
Chapter 8, Problem 21P
Textbook Problem
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## Determine the natural frequency of a pendulum whose length is 15 ft.

To determine

Find the natural frequency of a pendulum with the length of 15 ft.

### Explanation of Solution

Given data:

The length of pendulum (L) is 15 ft.

Formula used:

Consider the general expression for the period of oscillation.

T=1fn (1)

Here,

fn is natural frequency.

Consider the expression for the period of oscillation for pendulum.

T=2πLg (2)

Here,

g is acceleration due to gravity, which is known as 32.2fts2.

Calculation:

Substitute 15 ft for L and 32.2fts2 for g in equation (2),

T=2π15ft32

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