Skip to content
By using Twitter’s services you agree to our Cookies Use. We and our partners operate globally and use cookies, including for analytics, personalisation, and ads.

This is the legacy version of twitter.com. We will be shutting it down on June 1, 2020. Please switch to a supported browser, or disable the extension which masks your browser. You can see a list of supported browsers in our Help Center.

  • Home Home Home, current page.
  • About

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @
  • Language: English
    • Bahasa Indonesia
    • Bahasa Melayu
    • Català
    • Čeština
    • Dansk
    • Deutsch
    • English UK
    • Español
    • Filipino
    • Français
    • Hrvatski
    • Italiano
    • Magyar
    • Nederlands
    • Norsk
    • Polski
    • Português
    • Română
    • Slovenčina
    • Suomi
    • Svenska
    • Tiếng Việt
    • Türkçe
    • Ελληνικά
    • Български език
    • Русский
    • Српски
    • Українська мова
    • עִבְרִית
    • العربية
    • فارسی
    • मराठी
    • हिन्दी
    • বাংলা
    • ગુજરાતી
    • தமிழ்
    • ಕನ್ನಡ
    • ภาษาไทย
    • 한국어
    • 日本語
    • 简体中文
    • 繁體中文
  • Have an account? Log in
    Have an account?
    · Forgot password?

    New to Twitter?
    Sign up
fermatslibrary's profile
Fermat's Library
Fermat's Library
Fermat's Library
@fermatslibrary

Tweets

Fermat's Library

@fermatslibrary

A platform for illuminating academic papers. We publish an annotated paper every week. Our chrome extension for arXiv: https://fermatslibrary.com/librarian 

fermatslibrary.com
Joined September 2015

Tweets

  • © 2020 Twitter
  • About
  • Help Center
  • Terms
  • Privacy policy
  • Imprint
  • Cookies
  • Ads info
Dismiss
Previous
Next

Go to a person's profile

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @

Promote this Tweet

Block

  • Tweet with a location

    You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more

    Your lists

    Create a new list


    Under 100 characters, optional

    Privacy

    Copy link to Tweet

    Embed this Tweet

    Embed this Video

    Add this Tweet to your website by copying the code below. Learn more

    Add this video to your website by copying the code below. Learn more

    Hmm, there was a problem reaching the server.

    By embedding Twitter content in your website or app, you are agreeing to the Twitter Developer Agreement and Developer Policy.

    Preview

    Why you're seeing this ad

    Log in to Twitter

    · Forgot password?
    Don't have an account? Sign up »

    Sign up for Twitter

    Not on Twitter? Sign up, tune into the things you care about, and get updates as they happen.

    Sign up
    Have an account? Log in »

    Two-way (sending and receiving) short codes:

    Country Code For customers of
    United States 40404 (any)
    Canada 21212 (any)
    United Kingdom 86444 Vodafone, Orange, 3, O2
    Brazil 40404 Nextel, TIM
    Haiti 40404 Digicel, Voila
    Ireland 51210 Vodafone, O2
    India 53000 Bharti Airtel, Videocon, Reliance
    Indonesia 89887 AXIS, 3, Telkomsel, Indosat, XL Axiata
    Italy 4880804 Wind
    3424486444 Vodafone
    » See SMS short codes for other countries

    Confirmation

     

    Welcome home!

    This timeline is where you’ll spend most of your time, getting instant updates about what matters to you.

    Tweets not working for you?

    Hover over the profile pic and click the Following button to unfollow any account.

    Say a lot with a little

    When you see a Tweet you love, tap the heart — it lets the person who wrote it know you shared the love.

    Spread the word

    The fastest way to share someone else’s Tweet with your followers is with a Retweet. Tap the icon to send it instantly.

    Join the conversation

    Add your thoughts about any Tweet with a Reply. Find a topic you’re passionate about, and jump right in.

    Learn the latest

    Get instant insight into what people are talking about now.

    Get more of what you love

    Follow more accounts to get instant updates about topics you care about.

    Find what's happening

    See the latest conversations about any topic instantly.

    Never miss a Moment

    Catch up instantly on the best stories happening as they unfold.

    Fermat's Library‏ @fermatslibrary 20 Aug 2018
    • Report Tweet
    • Report NetzDG Violation

    Cancellation of Momentum: A ball is fired at 50 mph, out of a cannon from a truck that is going at 50 mph. The two momenta cancel each other and in the Earth reference frame the ball has 0 momentum.pic.twitter.com/lYsSdPvpHs

    6:12 AM - 20 Aug 2018
    • 13,069 Retweets
    • 45,436 Likes
    • Artificial Halil Erdem Rizka Kayla Investor SriCharan Tim Hopkin Jennifer Ayers matslemmens Anand Chhatpar
    460 replies 13,069 retweets 45,436 likes
      1. New conversation
      2. Michael Harris‏ @mikeharrisNY 20 Aug 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @fermatslibrary

        With respect to ground and defining left (-), right (+): 1) Before fired ball had <- momentum = P1= m x v1 = -m x 50mph 2) After fired ball has P1 momentum plus -> P2 = m x v = +m x 50mph In the defined frame: net momentum = P1+P2 = 0 OP stands correct #physics

        7 replies 14 retweets 163 likes
      3. Geoff‏ @_TheGeoff 20 Aug 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @mikeharrisNY @fermatslibrary

        But you could fire it at 100mph and drive at 1mph, momentum will still be conserved. This is just a special case.

        4 replies 0 retweets 18 likes
      4. 1 more reply
      1. New conversation
      2. NRL PHYSIO‏Verified account @nrlphysio 22 Aug 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @fermatslibrary

        @WarrenSmithFOX you need to tee this vision up to cross to during forward pass debates

        1 reply 2 retweets 22 likes
      3. Warren Smith‏ @WarrenSmithFOX 22 Aug 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @nrlphysio @fermatslibrary

        I think the physics might be lost on the disbelievers.

        2 replies 1 retweet 16 likes
      4. 1 more reply
      1. Leonardo de Assis‏ @psyfox 20 Aug 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @fermatslibrary

        Episode from mythbusters.https://www.youtube.com/watch?v=BLuI118nhzc …

        0 replies 5 retweets 116 likes
        Thanks. Twitter will use this to make your timeline better. Undo
        Undo
      1. New conversation
      2. Christophe‏ @cclarijs 20 Aug 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @fermatslibrary

        To be a ball, would you survive being fired upward out of a falling elevator at the same speed? Or is this only relevant on a horizontal axis?

        10 replies 2 retweets 13 likes
      3. AMNeves 黒猫‏ @iamNives 20 Aug 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @cclarijs @fermatslibrary

        You can cancel out your momentum when falling from an elevator with the same principle. BUT the force you would apply on the person to cancel would be the same as the impact, which means RIP

        1 reply 0 retweets 8 likes
      4. 5 more replies
      1. Chris Armstrong‏ @DrCDArmstrong 20 Aug 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @fermatslibrary

        I like you added "earth reference frame" just to head off that little bit of pedantry before it started.

        0 replies 0 retweets 73 likes
        Thanks. Twitter will use this to make your timeline better. Undo
        Undo
      1. New conversation
      2. Steve Matchett‏Verified account @MrSteveMatchett 21 Aug 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @fermatslibrary @Jason_A_Swales

        Thus conclusively proving the validity of the ‘moment of perfect stillness’.pic.twitter.com/UhCNKBkfyp

        1 reply 2 retweets 41 likes
      3. Jimmy J‏ @JJohns72 21 Aug 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @MrSteveMatchett @fermatslibrary @Jason_A_Swales

        I think this may be the cheesiest reply I've ever seen from @MrSteveMatchett

        0 replies 0 retweets 1 like
      4. End of conversation

    Loading seems to be taking a while.

    Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.

      Promoted Tweet

      false

      • © 2020 Twitter
      • About
      • Help Center
      • Terms
      • Privacy policy
      • Imprint
      • Cookies
      • Ads info