whatever

whatever

Apple Game Frameworks and Technologies: Gravity “speed” vs. “acceleration”

In Chapter 3, subsection “A Closer Look at Physics Bodies”, sidebar box “The Gravity of the Situation”:

It refers to “speed” when it should be “acceleration”. 9.8m/s is the rate of acceleration for a falling object on Earth (in the absence of resistance).

Thanks (I’m just a few chapters in, but finding the book good and useful so far).

Marked As Solved

Paradox927

Paradox927

Author and Editor at PragProg

This might be my favorite thread.

The short story is this: you are correct, so I’ve updated the book. Thank you. :blush:

The longer story, and the reason why I really like this thread, is because I didn’t realize the difference between speed and acceleration—at least not in the context of Earth’s gravity. I guess I never really gave it much thought, to be honest, but your comment sparked a desire for me to learn more about it.

So, I found a few articles, watched a few videos, and learned something new—and probably something I should have already known, so thank you (again).

P.S. I’m glad you’re enjoying the book.

Also Liked

whatever

whatever

I have such a big happy grin reading your response :smile_cat:

Physics was the one field of science I really geeked out on in school. The stuff around velocity (measuring instantaneous velocity vs. the positional graph of an object over time, etc.) totally fascinated me and has stuck all these years later (when so many others of my early school lessons are lost to the embers of time :laughing:).

As to the book, I’m a couple more chapters in and still enjoying it. Hoping to get a youngling in my life interested in collaborating on making a little game (or more than one) to get her engaged in coding.

Where Next?

Popular Pragmatic Bookshelf topics Top

jimmykiang
This test is broken right out of the box… — FAIL: TestAgent (7.82s) agent_test.go:77: Error Trace: agent_test.go:77 agent_test.go:...
New
brianokken
Many tasks_proj/tests directories exist in chapters 2, 3, 5 that have tests that use the custom markers smoke and get, which are not decl...
New
Alexandr
Hi everyone! There is an error on the page 71 in the book “Programming machine learning from coding to depp learning” P. Perrotta. You c...
New
sdmoralesma
Title: Web Development with Clojure, Third Edition - migrations/create not working: p159 When I execute the command: user=> (create-...
New
HarryDeveloper
Hi @venkats, It has been mentioned in the description of ‘Supervisory Job’ title that 2 things as mentioned below result in the same eff...
New
New
fynn
This is as much a suggestion as a question, as a note for others. Locally the SGP30 wasn’t available, so I ordered a SGP40. On page 53, ...
New
adamwoolhether
Is there any place where we can discuss the solutions to some of the exercises? I can figure most of them out, but am having trouble with...
New
s2k
Hi all, currently I wonder how the Tailwind colours work (or don’t work). For example, in app/views/layouts/application.html.erb I have...
New
jwandekoken
Book: Programming Phoenix LiveView, page 142 (157/378), file lib/pento_web/live/product_live/form_component.ex, in the function below: d...
New

Other popular topics Top

Devtalk
Reading something? Working on something? Planning something? Changing jobs even!? If you’re up for sharing, please let us know what you’...
1050 20964 393
New
AstonJ
SpaceVim seems to be gaining in features and popularity and I just wondered how it compares with SpaceMacs in 2020 - anyone have any thou...
New
AstonJ
You might be thinking we should just ask who’s not using VSCode :joy: however there are some new additions in the space that might give V...
New
AstonJ
poll poll Be sure to check out @Dusty’s article posted here: An Introduction to Alternative Keyboard Layouts It’s one of the best write-...
New
Exadra37
I am asking for any distro that only has the bare-bones to be able to get a shell in the server and then just install the packages as we ...
New
PragmaticBookshelf
Create efficient, elegant software tests in pytest, Python's most powerful testing framework. Brian Okken @brianokken Edited by Kat...
New
AstonJ
We’ve talked about his book briefly here but it is quickly becoming obsolete - so he’s decided to create a series of 7 podcasts, the firs...
New
New
AnfaengerAlex
Hello, I’m a beginner in Android development and I’m facing an issue with my project setup. In my build.gradle.kts file, I have the foll...
New
Fl4m3Ph03n1x
Background Lately I am in a quest to find a good quality TTS ai generation tool to run locally in order to create audio for some videos I...
New

Sub Categories: