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    #46
    ^^^^^^^^^^^^^^

    Right so you drop from 32 feet it falls for 1 second so when lands generates 16000lbs of force.

    If am wrong I am wrong Its been a long time since I have had to think about anything like this, guess I am very rusty.
    Originally posted by Fusion
    If a car is the epitome of freedom, than an electric car is house arrest with your wife titty fucking your next door neighbor.
    The American Republic will endure until the day Congress discovers that it can bribe the public with the public's money. -Alexis de Tocqueville


    The Desire to Save Humanity is Always a False Front for the Urge to Rule it- H. L. Mencken

    Necessity is the plea for every infringement of human freedom. It is the argument of tyrants.
    William Pitt-

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      #47
      NO, you are way off on all accounts and are making all kinds of incorrect assumptions and misusing units.

      please read the thread, we have already covered how this works.

      Comment

        #48
        mrsleeve... are you serious? Really?

        Do you even know what mass or weight or force really mean?

        And as was already stated, newton's second law is not true for inelastic collisions. So stop saying F = ma, because it doesn't.

        Comment

          #49
          Ok real world here, not a text book deal. I admit its been almost 13 years since I have even thought about such things the math is not there any more nor are the concepts,

          I guess the old saying holds true you dont use it you lose it. Ok I guess I am an idiot.
          Originally posted by Fusion
          If a car is the epitome of freedom, than an electric car is house arrest with your wife titty fucking your next door neighbor.
          The American Republic will endure until the day Congress discovers that it can bribe the public with the public's money. -Alexis de Tocqueville


          The Desire to Save Humanity is Always a False Front for the Urge to Rule it- H. L. Mencken

          Necessity is the plea for every infringement of human freedom. It is the argument of tyrants.
          William Pitt-

          Comment

            #50
            posted on e30tech:
            Originally posted by yesterdaylight View Post
            hmm try something around 14lbs

            thats after figuring that the force is distributed over .01s. It's hard to calculate because you really really need the time interval. It will drastically change the answer.

            m1v1 + Fdt = 0
            so mSQRT(2gh) + Fdt = 0

            solve for m
            14 lbs is the same number we came up with, but it seemed really light.

            2012 MCSCC/NSSCC CP class champ
            HSAX Instructor

            Comment

              #51
              sigh.

              still using lbs. for mass are we?
              Last edited by TwoJ's; 02-27-2008, 08:24 AM.

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                #52
                Alright. asked the AP Physics teacher and its just 500/32 = 15 and some change in slugs.

                But he said if your talking 500lb of pressure you would need the surface area.

                Comment

                  #53
                  That guy is teaching AP physics? Hmm... 500/32 would give you the mass of an object in static load with a normal force of 500lb.

                  He's got a case of too much newton's 2nd. Once again, that doesn't count here. When you go back to class tomorrow, ask him about impulse.

                  Comment

                    #54
                    I know about impulse. I've finished first semester but I'm wondering what exactly the question is. If it is for pressure or just the force?

                    And I probably left something out. I didn't write it down or anything.

                    Comment

                      #55
                      Yeah, the question at hand really doesn't leave anything to be realistically solved anyways.

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