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

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September 3, 2020
by
Physics Girl
Freefall - Physics 101 / AP Physics 1 Review with Dianna Cowern

## TL;DR

This video lesson explores the concept of free fall in physics, including analyzing the time, velocity, and acceleration of falling objects.

## Key Insights

• 🎞️ In the absence of air resistance, the time taken for the trip up and the trip down of a falling object is the same.
• 🍂 The average velocity trick is a useful tool for finding the average velocity and distance traveled by a falling object.
• 😄 The equation d = 1/2at^2 can be used to solve problems related to falling objects.

## Transcript

(host) This is a wrecking ball dropped by the guys from the YouTube channel How Ridiculous, falling from a tower 35 meters above the world's strongest trampoline. You might think the most interesting part is waiting to see if the ball smashes through the trampoline, which it does not. But you're wrong. The most interesting part is that we can figur... Read More

### Q: Why did the video mention the bottle flipping challenge?

The video mentions the bottle flipping challenge because it presents a physics riddle related to the challenge. It asks whether the trip up or the trip down takes longer when throwing a bottle up in the air and catching it.

### Q: What is the significance of the average velocity trick?

The average velocity trick is a useful tool for finding the average velocity and distance traveled by an object in free fall. By measuring the change in velocity over a specific time interval, the average velocity can be determined, which can then be used to find the distance traveled.

### Q: What is the purpose of the experiment involving dropping antimatter?

The purpose of the experiment is to determine whether antimatter falls up or down. If antimatter falls up, it would have significant implications for the field of physics and our understanding of gravity.

### Q: How does air resistance affect the trip up and down of a falling object?

Air resistance slows down the trip up of a falling object, as it opposes the object's motion. On the trip down, air resistance can slow down the object more quickly, resulting in a longer time spent falling.

## Summary & Key Takeaways

• The video starts by discussing objects in freefall and how their position and velocity change as they fall.

• It then presents a riddle about a water bottle thrown in the air and asks whether the trip up or the trip down takes longer.

• The video explains that the time taken for the trip up and the trip down is the same in the absence of air resistance.

• The concept of average velocity and the equation d = 1/2at^2 are introduced and applied to solve problems related to falling objects.

• The video concludes by mentioning an experiment conducted by physicists to drop antimatter and determine whether it falls up or down.