**Physics Practicals Class 11**

# Simple pendulum

- Teach science experiments in a gamified way
- Boost conceptual clarity and knowledge retention
- Aligned with National Education Policy 2020
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- CBSE, ICSE, and state boards aligned curricula
- Engaging simulations with easy-to-teach instructions

### About Simulation

- With the simulation, you will gain a comprehensive understanding of how to determine the time period and effective length of a simple pendulum.
- By participating, you can acquire the skills needed to measure the radius of the spherical bob using vernier callipers and plot graphs to calculate the effective mass of the pendulum.
- At the conclusion of the simulation, you will learn the concept of a seconds pendulum.
- Through participation, you will grasp the principles behind the time period of a simple pendulum and its effective length.

- Additionally, you will understand the working principle of a simple pendulum and how to measure the diameter using vernier callipers.

### Simulation Details

Description

**Second’s pendulum: **

It is a pendulum that takes precisely one second to move from one extreme position to other. Thus, its time period is precisely 2 seconds.

**Simple pendulum: **

A point mass is suspended by an inextensible, massless string from a rigid point support. In practice a small heavy spherical bob of high-density material of radius r, much smaller than the length of the suspension, is suspended by a light, flexible, and strong string/thread supported at the other end firmly with a clamp stand.

The distance L between the point of suspension and the centre of spherical bob (centre of gravity), is called the effective length.

L = l + r + e

where, l is the length of the string from the top of the bob to the hook,

e is the length of the hook

r is the radius of the bob.

The simple pendulum executes Simple Harmonic Motion (SHM) as the acceleration of the pendulum bob is directly proportional to its displacement from the mean position and is always directed towards it.

The time period (T) of a simple pendulum for oscillations of small amplitude, is given by the relation,

where, L is the effective length of the pendulum

g is the acceleration due to gravity

### Requirements for this Science Experiment

- Meter scale
- Vernier calliper
- Thread
- Stopwatch

- Meter
- Spherical bob
- Retort stand
- Split cork

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