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

abtin
page 20: … protoc command… I had to additionally run the following go get commands in order to be able to compile protobuf code using go...
New
jeffmcompsci
Title: Design and Build Great Web APIs - typo “https://company-atk.herokuapp.com/2258ie4t68jv” (page 19, third bullet in URL list) Typo:...
New
yulkin
your book suggests to use Image.toByteData() to convert image to bytes, however I get the following error: "the getter ‘toByteData’ isn’t...
New
mikecargal
Title: Hands-On Rust (Chapter 11: prefab) Just played a couple of amulet-less games. With a bit of debugging, I believe that your can_p...
New
patoncrispy
I’m new to Rust and am using this book to learn more as well as to feed my interest in game dev. I’ve just finished the flappy dragon exa...
New
hgkjshegfskef
The test is as follows: Scenario: Intersecting a scaled sphere with a ray Given r ← ray(point(0, 0, -5), vector(0, 0, 1)) And s ← sphere...
New
Charles
In general, the book isn’t yet updated for Phoenix version 1.6. On page 18 of the book, the authors indicate that an auto generated of ro...
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
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
EdBorn
Title: Agile Web Development with Rails 7: (page 70) I am running windows 11 pro with rails 7.0.3 and ruby 3.1.2p20 (2022-04-12 revision...
New

Other popular topics Top

DevotionGeo
I know that these benchmarks might not be the exact picture of real-world scenario, but still I expect a Rust web framework performing a ...
New
AstonJ
There’s a whole world of custom keycaps out there that I didn’t know existed! Check out all of our Keycaps threads here: https://forum....
New
AstonJ
Thanks to @foxtrottwist’s and @Tomas’s posts in this thread: Poll: Which code editor do you use? I bought Onivim! :nerd_face: https://on...
New
AstonJ
I have seen the keycaps I want - they are due for a group-buy this week but won’t be delivered until October next year!!! :rofl: The Ser...
New
PragmaticBookshelf
Create efficient, elegant software tests in pytest, Python's most powerful testing framework. Brian Okken @brianokken Edited by Kat...
New
rustkas
Intensively researching Erlang books and additional resources on it, I have found that the topic of using Regular Expressions is either c...
New
PragmaticBookshelf
Build efficient applications that exploit the unique benefits of a pure functional language, learning from an engineer who uses Haskell t...
New
husaindevelop
Inside our android webview app, we are trying to paste the copied content from another app eg (notes) using navigator.clipboard.readtext ...
New
New
PragmaticBookshelf
Fight complexity and reclaim the original spirit of agility by learning to simplify how you develop software. The result: a more humane a...
New

Sub Categories: