Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

How to defuse (disable) a T-rex?

  1. Jun 30, 2015 #1
    I watched Juressic World.And there they are trying to destroy Trex to shooting it.I measn people using guns to kill or defuse a Trex.
    I have a duck.And when duck turns upside down,I mean when its back touches ground it cant get up itself.So here my idea
    We can turn Trex Upside down,again I mean the back touches ground,Trex cannot get up cause he has two legs.
    Is my idea true ?

    Note:Maybe this is not a biology question.I dont know
  2. jcsd
  3. Jun 30, 2015 #2


    User Avatar
    Gold Member

    You could call it a biomechanics question. I wonder if they wouldn't be able to roll to one side and stand with just their feet.
  4. Jun 30, 2015 #3


    User Avatar
    Staff Emeritus
    Science Advisor

    It would require a substantial amount of work to get a T-rex to fall directly onto its back. Animals, of all sizes, typically rotate their limbs and body when falling so that they don't fall on their backs, but onto their feet or sides instead. Getting a T-rex to fall onto its back is probably much harder than making a cat fall directly on its back, and I've never even been able to do the latter.
  5. Jun 30, 2015 #4


    User Avatar
    Staff Emeritus
    Science Advisor

    IIRC T-Rexes are estimated to have weighed about 7 tonnes which is comparable to an African Elephant. We have guns that can take down an elephant, if you wanted to kill a T-Rex using one of those would be a lot easier than trying to get it to somehow fall on its back.
  6. Jun 30, 2015 #5

    jim mcnamara

    User Avatar

    Staff: Mentor

    Ryan has it nailed exactly.

    There were very powerful elephant guns in use in the first half of the 20th Century. For example - the 600 nitro express, which was a side by side rifle that was very heavy. These rifles were actually overpowered as they were designed to stop a charging very large mammal -elephant or rhino. They did exactly that. And probably damaged the soft tissue of the shooter's shoulder.

    If we were actually having to deal with large charging dinosaurs with same same mass as an elephant then we already have the technology to instantly flatten said beastie, dating from about 1903. Old but effective. Which would derail the plot -- I am guessing.
  7. Jun 30, 2015 #6
    I recall seeing a dinosaur show on History Channel a few years back and they maintained that, due to their great mass, if a T-Rex fell over for any reason, it would be guaranteed to break bones and be crippled. Therefore, it wouldn't be necessary to make it fall on its back. Making it fall any way at all, would put it out of commission.

    It that's true, it would mean the T-Rex wasn't the fast-running predator of the movies, but a scavenger that actually strolled around at a safe, slow pace, sniffing around for things that were already dead by other means. It couldn't risk a chase or a battle with prey.
  8. Jun 30, 2015 #7

    From here
    the muzzle velocity is up to 2450 Fps and the muzzle enrgy is up to 11995 Ft. Lbs. Or 16172 Joules

    comparing to other other firearms from
    Firearm - Caliber - Muzzle energy ft-lbs joules
    air gun spring .177 15 20
    air gun mag spring .22 22 30
    air gun https://www.physicsforums.com/wiki/Pre-charged_pneumatic_(PCP) [Broken] . 22 30+ 40+
    pistol https://www.physicsforums.com/wiki/.22_Long_Rifle [Broken] 117 159
    pistol https://www.physicsforums.com/wiki/9%C3%9719mm_Parabellum [Broken] 383 519
    pistol https://www.physicsforums.com/wiki/.45_ACP [Broken] 416 564
    pistol https://www.physicsforums.com/wiki/.357_Magnum [Broken] 640 873
    pistol https://www.physicsforums.com/wiki/10mm [Broken] 775 1,057
    rifle https://www.physicsforums.com/wiki/5.56%C3%9745mm_NATO [Broken] 1,325 1,796
    rifle https://www.physicsforums.com/wiki/7.62%C3%9739mm [Broken] 1,527 2,070
    rifle https://www.physicsforums.com/wiki/7.62%C3%9751mm_NATO [Broken] 2,802 3,799
    heavy https://www.physicsforums.com/wiki/.50_BMG [Broken] 11,091 15,037
    heavy https://www.physicsforums.com/wiki/14.5%C3%97114mm [Broken] 23,744 32,000

    The https://www.physicsforums.com/wiki/7.62%C3%9751mm_NATO [Broken] was a Nato round M14,( Vietnam) - apparantly not enough to stop a T-rex. ( M16 similar )
    The https://www.physicsforums.com/wiki/7.62%C3%9739mm [Broken] was soviet ie the famous AK47
    The https://www.physicsforums.com/wiki/.50_BMG [Broken] Browning machine gun, sniper ammo - better choice.

    Seems like the regular ammo issue for gun enthusiasts and regular army infantry would be lacking in penetration power - maybe only 10 inches through tough skin and flesh.
    T-Rex might be annoyed. Lucky shot to vital organs - possible but unlikely.
    Last edited by a moderator: May 7, 2017
  9. Jun 30, 2015 #8


    User Avatar

    Staff: Mentor

    RPG be good... :smile:
  10. Jun 30, 2015 #9
    Several darts which inject a sedative?
    I think that has been used in real life with less dangerous animals.
    Harden the darts with depleted uranium if necessary.
    Last edited: Jun 30, 2015
  11. Jun 30, 2015 #10


    User Avatar
    Staff Emeritus
    Science Advisor

    I think this thread has run its course. Thread locked.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: How to defuse (disable) a T-rex?
  1. T-Rex Gone Wild! (Replies: 4)