# Free Body Diagrams - Physics 101 / AP Physics 1 Review with Dianna Cowern | Summary and Q&A

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October 1, 2020
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Physics Girl
Free Body Diagrams - Physics 101 / AP Physics 1 Review with Dianna Cowern

## TL;DR

This physics lesson explains the concept of free body diagrams and demonstrates how they can be used to measure the acceleration of gravity.

## Key Insights

• 💆 Gravity is one of the four fundamental forces and is the weakest force proportional to mass.
• 🥶 Free body diagrams are a useful tool to represent and analyze the forces acting on an object.
• 🎰 The Atwood machine experiment can be used to measure the acceleration of gravity.
• 🙂 The acceleration of gravity can vary slightly depending on the location, due to variations in gravitational field strength.
• ❓ Proper measurement and calculation techniques are necessary to minimize errors in determining the acceleration of gravity.
• 🌍 Physics is a fundamental science that helps explain the reasons behind various phenomena in the world.
• 🥶 Practice with free body diagrams and gravitational acceleration problems is crucial for mastering physics concepts.

## Transcript

HOST: Inside this box, I have an egg. And the box is completely closed, so I also have an LED inside so you can see what's going on. As I filmed with the GoPro I have taped inside the box, I'm going to do something to the box. Watch closely what happens. Can you guess what I did? Hey, everyone. I'm Dianna. And welcome to Lesson 5 of Dianna's Intro ... Read More

### Q: What is a free body diagram?

A free body diagram is a simple representation of the forces acting on an object, allowing us to isolate and analyze the forces affecting that object.

### Q: How are the four fundamental forces related to gravity?

Gravity is one of the four fundamental forces, but it is the weakest force proportional to mass. Electromagnetic force, weak nuclear force, and strong nuclear force are the other three fundamental forces.

### Q: How is gravity measured using the Atwood machine experiment?

By timing the rate of fall of masses on an Atwood machine and using free body diagrams, the acceleration of gravity can be calculated.

### Q: Can the acceleration of gravity vary in different locations?

Yes, the acceleration of gravity can vary slightly depending on the location due to variations in gravitational field strength.

## Summary & Key Takeaways

• The lesson introduces free body diagrams as a tool to represent the forces acting on an object.

• The video explains the four fundamental forces in physics: gravity, electromagnetic force, weak nuclear force, and strong nuclear force.

• The Atwood machine is used as an experiment to measure the acceleration of gravity, taking into account the masses and tensions involved.