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9 Laws of Physics That Don't Apply in Hollywood

Ant writes "Neatorama lists nine laws of physics that don't apply in Hollywood (movies and television/TV shows). In general, Hollywood filmmakers follow the laws of physics because they have no other choice. It's just when they cheat with special effects that people seem to forget how the world really works..."

14 of 807 comments (clear)

  1. Same topics all over again by yohanes · · Score: 5, Insightful

    It seems that we have discussed this kind of things so many times. Hollywood are not meant to learn about real world. It is about entertainment.

    1. Re:Same topics all over again by squiggleslash · · Score: 4, Insightful

      Yes and no. There has to be a willing suspension of disbelief, and frequently Hollywood (and television) assumes that the number of people in the viewership of a particular program is so low it quite happily removes all semblance of reality for that "minority" to the point, not really caring that the entire movie looks utterly ridiculous as a result for that group. What's bizarre to me is how rarely it's necessary for the plot or understandability of the end story for them to do that.

      It would probably serve the plot well for quite a few films if a normal car's cruise control allowed the car to drive unmonitored, or if newspapers talked and responded to spoken database queries. They don't do either because almost the entire audience knows that there is too large a gap between reality and fiction for those specific examples. But if it involves computers, explosions and weapons, gravity, or even breaking glass, anything goes... Hell, sometimes if it's something that everyone knows today is ridiculous but once upon a time was a black-art, they'll get away with it because it's a cliche. Don't forget to hang up the telephone before they're able to trace the call!

      It's worse when so-often the inaccuracies are basicly a Deus Ex Machina to get the hero out of a problem. If Chloe wasn't able to trace the call through the binary, Jack wouldn't know the terrorist's address, and so wouldn't be able to cross Los Angelas in twenty minutes at mid-day to prevent them from using the code they downloaded from the satellite to their PDAs to activate the chemical weapons.

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    2. Re:Same topics all over again by Hoi+Polloi · · Score: 4, Insightful

      I have to admit, if Hollywood was realistic and didn't have sound in space it would make sci-fi action films pretty dull. It would just have a lot of background music so I let them off on that one.

      BTW, "2001, A Space Odyssey" was true to the no sound in space law and used it to dramatic effect. All you heard was the dull whir of systems in the pods or the astronaut's breathing.

      --
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  2. Umm... by geoffspear · · Score: 4, Insightful

    If you're going to write an article about the laws of physics, shouldn't you actually understand the laws of physics? "Equal and opposite reaction" doesn't mean that when I kick someone and they go flying in one direction, I must go flying in the opposite direction at the same speed, unless I had no momentum toward them before impact. In which case, umm, it would be kind of hard for me to hit them.

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  3. Re:Some points aren't valid by Rob+the+Bold · · Score: 5, Insightful

    If I punch a punching bag, the bag moves but I don't. That is because my fist has the energy which transfers to the bag. I don't go flying backwards as the article suggests.

    Friction, dude. Try the experiment again on roller skates.

    --
    I am not a crackpot.
  4. #4 and #5 by MeanderingMind · · Score: 5, Insightful

    I've got two complaints about #4.

    1) The point of the Matrix was to bend the laws of physics. It was rather explicit.

    2) The author obviously never watched Bruce Lee in action. If you plant yourself correctly you can send people flying across the room without moving an inch yourself. However, if you're in midair you certainly can't without the mentioned conversion of momentum.

    Also concerning #5.

    1) If it's a hole with level ends on both sides, it is entirely impossible to jump it on car without a ramp or other device to add a vertical component to velocity. However, in the event of a bridge being raised for a boat, the angle can potentially allow a vehicle to "jump" the gap. Is it likely or feasible? Not particularly, but it is possible.

    2) This could have been expanded to include the "Bombs do not drop straight down" category of gravitational violation. A plane flying at high horizontal velocity v over a stationary target is not capable of dropping a bomb without horizontal velocity. Unless it fires the bomb backwards at a relative velocity -v, in which case we can have a semantic argument over whether the bomb is being dropped or fired.

    --
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  5. Other laws by 91degrees · · Score: 5, Insightful

    Fast paced music doesn't really play when something exciting happens. Not everyone in real life looks like a hollywood actor. If people speak in a foreign language, you don't actually see an English language translation at the bottom of the screen. I tend to be pretty easy going on most non-realism since it is just there to tell a story. If the plot relies on a complete failure to grasp some basic fundamental of physics, (e.g. The Day After Tomorrow), I tend to be a lot more critical.

  6. Never mind hollywood by Timesprout · · Score: 3, Insightful

    I am becoming more convinced that people watch series like 24 or The Unit and are mistakenly under the impression that they are accurate representations of US capability. Vast computing power at everyones fingertips, satellites retasked at a moments notice for real time video, instant communication anywhere in the world, highly sophisticated gadgets that never fail in the field and of course clairvoyant and all knowing agents. No surprise the US has been so gung-ho lately.

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  7. Re:Outerspace is Cold by i_should_be_working · · Score: 4, Insightful

    So, like you and the two responses above me, I was really skeptical of this "freezing in space" idea. I even told a student that a reference they had cited was wrong in claiming that you would freeze to death in the Sun's corona, the argument being that you wouldn't freeze for the same reason you wouldn't burn: no particles to transport heat.

    But I recently found out, from a colleague over beer, that loss of heat from blackbody radiation is actually much faster than I thought. In the old days, in non-cold places, some people (ancient Egyptions among others) would actually make ice, basically by letting water in a deep, dark place radiate it's heat away. Sure it took hours, and it had to be already pretty cold outside, but considering that the water was also being continually warmed by all the air around it, that's pretty impressive for "only" blackbody radiation.

    It's pretty easy to calculate heat loss. According to this, in our 293K atmosphere we lose 95W. In a 2.7K vaccuum this translates to 640W, due to us not getting any energy back from the atmosphere. With an average human body heat capacity of 3470 Joules per Kelvin per Kilo, a 70Kg person will drop to the freezing point from 305K in less than 3 and a half hours.

    Ok, so that's pretty slow. Damn those movies suck.

  8. Re:the most famous example is not mentioned by AKAImBatman · · Score: 3, Insightful

    I refer, of course, to the infamous 250-shot revolver.

    basically, back in the black and white days, nobody EVER reloaded their guns.

    Hollywood still does that. But with modern weapons being capable of holding an indeterminate size of clip (as opposed to the standard six-shooter), it's difficult to call them on it. They just throw a few clip ejections into the fray to make it seem like the characters are really reloading.

    You can kind of call them on double-barreled shotguns, but Hollywood has slowly phased those out for pump-action weapons. Of course, those are similarly amusing, but for different reasons. I was just watching an old episode of Sliders the other day where the characters are carrying pump-action shotguns. Every time they cut to a new scene, the characters would re-pump their shotguns. Which was rather amusing considering that they hadn't fired a single round...
  9. Re:Some points aren't valid by joto · · Score: 4, Insightful
    Nope. It's because:
    1. The punching bag is much lighter than you, so the force in the punch will move it forward much faster than it will move you backwards.
      • In a correctly done punch you will start the movement at your feet and accelerate your hips/body as well as your fist toward the target. This means that instead of you being moved backwards by the impact, the impact will stop (some of) your forward movement.
      • In an incorrectly done punch, it will be only your fist and the punching ball that collides (not you or your body weight behind it). This is insufficient force/momentum to move your body in any significant way (or do any damage to an opponent in a fight)
  10. Re:9 Bad Excuses for a Fluff Piece by ceoyoyo · · Score: 5, Insightful

    Um... recall Galileo... the back of the bus being heavier will not cause it to fall any faster than the lighter front. Neglecting air resistance, but with something the mass of a bus that's not so bad an assumption.

    You're right, they DID jump a bus. BUT, they had a special kicker on the end of the ramp that dropped after the front wheels went over. Watch the scene again... see how the front wheels seem to leap up? There's a documentary around somewhere showing how everything worked and the actual bus jump, but I can't remember where I saw it or what it was called.

    Even a car will always land hard on its front wheels (if you're lucky) or its nose or roof (if you're not) after going off a static ramp.

  11. What about the others? by SnarfQuest · · Score: 3, Insightful

    1. You can enlarge the eye of someone in a photo, or a video, and get a good full-size image of what they are looking at.

    2. If you find a single hair at a crime scene, it always will be from one the criminals, not any of the hundreds of other people who walked through the place recently.

    3. If you run out of bullets, you are requirecd to throw your gun at your foe. You will also never be able to hit him with it.

    4. Searching for a fingerprint in a computer database requires that every fingerprint in that database be displayed on your terminal. Also, when trying to break a password, you must display every single password being tried.

    --
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  12. a couple of problems by cout · · Score: 3, Insightful

    "So, when you see a gal kick someone across the room, technically, the kicker (or holder of a gun) must fly across the room in the opposite direction - unless she has a back against the wall."

    I think the author is confusing conservation of energy with conservation of momentum. In an elastic collision, in which energy is conserved, two people of equal mass will head in opposite directions. In reality, both the kicker and the kickee will absorb some of the energy of the kick, thus resulting in an inelastic collsion.

    "For instance, in space the hero shouldn't be able to shout out instructions to the other astronauts from a spot several yards away."

    That's what radio transmitters are for, and if you're wearing your helmet, you probably have a radio.

    Explosions are what are particularly interesting. You will hear something as particles from the explosion collide with the hull of your ship, but it probably won't sound like an explosion.