# Simple Harmonic Motion - Physics 101 / AP Physics 1 Review with Dianna Cowern | Summary and Q&A

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January 15, 2021
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Physics Girl
Simple Harmonic Motion - Physics 101 / AP Physics 1 Review with Dianna Cowern

## TL;DR

In this lesson, Diana Cowan explains the concept of simple harmonic motion and how it relates to pendulums. She demonstrates how to calculate the period of a pendulum and shows real-world examples of simple harmonic motion. Additionally, she discusses the relationship between period and the length of a pendulum.

## Key Insights

• 🫥 Simple harmonic motion refers to the back and forth movement of objects along a straight line.
• ⌛ The period of a pendulum, or the time it takes for one swing, can be calculated using the equation T = 2π√(L/g).
• 🧑‍🏭 The length of the string and the acceleration due to gravity are the only factors that affect the period of a pendulum.
• ❓ Simple harmonic motion is a useful concept in understanding various oscillatory motions in physics.
• 😙 The period of an oscillating spring can be calculated using the equation T = 2π√(m/k), where m is the mass and k is the spring constant.
• 🥡 The period of a pendulum can be used to determine the height of an object by measuring the time it takes for one swing.
• 🚀 Physics concepts like simple harmonic motion are applicable in real-world scenarios, including space exploration and rocket launches.

## Transcript

a few weeks back i visited my friend simone who let me tie a bowling ball to a tree at her workshop in order to demonstrate the conservation of energy all without smashing my face and we're gonna come back to this most excellent demo because by the end of today's lesson you and i are going to figure out exactly how high that tree branch is just by ... Read More

### Q: What is simple harmonic motion?

Simple harmonic motion refers to the back and forth movement of objects along a straight line, such as a swinging pendulum or a vibrating spring. It occurs when there is a linear restoring force proportional to displacement.

### Q: How is the period of a pendulum calculated?

The period of a pendulum can be calculated using the equation T = 2π√(L/g), where T is the period, L is the length of the string, and g is the acceleration due to gravity.

### Q: What factors affect the period of a pendulum?

The period of a pendulum is solely dependent on two factors: the length of the string and the acceleration due to gravity. Other factors like the mass of the object and the displacement height do not affect the period.

### Q: Can you provide examples of simple harmonic motion?

Examples of simple harmonic motion include the swinging of a pendulum, vibrating springs, bobbing ducks in ripples, the oscillation of a guitar string when plucked, and the motion of a swinging door stopper.

## Summary & Key Takeaways

• Simple harmonic motion refers to the back and forth movement of objects, such as a swinging pendulum or a vibrating spring.

• The period of oscillation, or the time it takes for a pendulum to complete one swing, is a crucial factor in simple harmonic motion.

• The length of the string and the acceleration of gravity are the two factors that determine the period of a pendulum.