Brent Corringan In Shower

La física - Physics

al-fīziyā . " How is physics, is not it, folks? You know particular that come to my office every day hundreds of letters from all over the world. In them, readers of the blog I participate doubts and uncertainties, phobias and desires, they tell me how difficult it is to be a champion of skeptical thinking and what it costs them not to be fooled. Let's see what that says a reader, chosen at random: Hello, friend Pol, my name is Eleni and I am Greek. I have curves and super-duper, all night, I imagine you naked. see, what happens to me is this: every day makes me uphill analyze everything I see. Yes, my friend Pol, I feel deceived, that my mind is dirty. What I can do? Dear friend, using physics. Friends, use it without complexes! Do you want an example? Here it is.

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First, look at this video (patience, because the video itself starts at 31 seconds):


Leaving aside the dubious necessity had to destroy a great song , we have a poor girl of all suspicious because he was black. At one point, turning a corner, runs like a soul that takes the devil, annoying and pushing everyone told passersby. However, in the end, when we thought which is worse than the bark, is that no, he did because, on the other side of the block, bricks were to fall on a girl and wanted to save. Yes, folks, I too get the sweet odor of demagogy and simplonería, but let's get to the point: can we learn from what height the happy falling bricks, so the guy gave you time to get from the other side apple? Let's see.

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What it took to get from one point to another in the street?

• We know that medium apple has about 60 m long.
• Let's be generous and think-that it is being generous- this guy is the very Usain Bolt, can be made 100 m in 9.58 s with little muss. Let's be more generous
• still and think that clashes with passers have not disturbed his career.

100 m 60 m 9.58 s
in x s

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x = (60 ° 9.58) / 100
x = 5.748 s

the turkey cross the block would at 5.748 s . We believe it.

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How fast falling bricks, that time has given arriving in 5.748 s?

• Let the bricks were at rest (v α, or 0 m / s ) right in the moment when the race begins mangurrián and 5, 8 48 s later, a split second after the young save the girl, hit the ground at a speed (v ω) still do not know.
• know that, although it is different depending on where we are, the gravity of the Earth implies that, on average, all falling body undergoes an acceleration of about 9.8 m / s ² , regardless of its mass.

v ω = gravity · time
v ω = 9.8 m / s ² ·
v 5.848 s ω = 57.3104 m / s

is, that fell to the floor, the bricks were to 57.3104 m / s . Now that we know the initial velocity (v α) and the final velocity (v ω), we get the average speed of falling bricks.

v _half = (v + v α ω ) / 2 v
_half = (0 m / s + 57.3104 m / s) / 2 v
_half = 28.6552 m / s

So speed average fall was 28.6552 m / s during 5.848 s . The rest is a breeze, and definitive to prove empirically that we are kidding, folks.

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From what height would have to drop the bricks so that the video Usain would have had time to get there?

• If we know what was the average speed of the fall and how long we can make the space covered by the bricks, that is, the height (h ) from which they fell.

h = speed · time
h = 28.6552 m / s, 5.848 s
h = 176.5756096 m

presto! Recall that the tower of the Cathedral of Murcia, with everything that is high, measures 98 m with the vane. It turns out that when the video guy saw that the bricks would fall, were more than 176 m up ... That we are not stupid, man! Oh ...

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Conclusion

Given the physical impossibility that someone will see some falling bricks from 176 m high, with the physical inability to react in 0 seconds and takes less than 6 on the scene, the only conclusion I draw that black is concerned, quite possibly, it was a terrible person. The peaceful citizens swarmed the street did very well to avoid it, because his only intention was to run and push them, bother them and throwing the trays. Above, if that were not enough, as a great climax of evil, pouncing on a poor girl who was talking quietly on the phone, God knows what libidinous intentions. What of the bricks was a fluke. Whoever made this video is a moron. Quod erat demonstrandum.