Tsatoumas does it again, 8.54!!!

[tafnut]

Well, taking off at 0 degrees (or do you call that 90)

Whether you took off at 0 degrees or 90, I can tell you EXACTLY what your distance travelled would be: zero!

[26mi235]

Hey, I'm a high school physics class dropout, what can I say! I believed it when somebody told me that if a long jumper ran down the runway and jumped, if the speed (at takeoff) stayed constant, the amount of time in the air would remain the same, no matter the angle/distance.

Well, taking off at 0 degrees (or do you call that 90) could get you a little way out in some of the pits discuss in the thread, but it would not get you off the runway and hence only a trivial distance.

[gh]

Hey, I'm a high school physics class dropout, what can I say! I believed it when somebody told me that if a long jumper ran down the runway and jumped, if the speed (at takeoff) stayed constant, the amount of time in the air would remain the same, no matter the angle/distance.

[eldrick]

we dont have the data for lutz/powell's jumps, but assuming they were similar height ( same centre of mass ), lutz with presumed bigger angle wouda been no more than 22 degrees ( never seen data with anyone higher ) & i believe powell was about 20 - 21 degrees, so using :

http://www.walter-fendt.de/ph11e/projectile.htm

a) lutz with c o m of 1.25m & 22 degrees, putting in figures to give 8.54m jump ( thru trial-n-error ) gives speed of 9.41 m/s & time of

0.979s

b) powell, with 20 degrees & 1.25m for 8.95 jump, speed is 9.935 m/s for time of

0.959s

with bigger angle of 21 degrees & 1.25m for 8.95m jumps, speed is 9.81 m/s & time of

0.977s

at most there appears a 0.02s difference which considering how much the data input error must be, i'd consider unlikely any significant difference in hang time between the 2

c) as for soto, hang time shoud be extended from take-off to theoretical landing at ground level to be consistent with above :

now he's taller, so call his c o m 1.30m & angle 70 - 80 degrees for maximum height 2.45m :

70 degrees : speed = 5.05 m/s & time = 1.190s

80 degrees : speed = 4.83 m/s & time = 1.192s

soto hang-time to extrapolating to hitting ground level is likely significantly bigger

[Powell]

Huh! Unless I've lost all understanding of physics, hang time is directly related to distance jumped. Mike Powell had the best hang time, period.

Obviously you HAVE lost all understanding of physics. Hang time is distance jumped divided by horizontal velocity, which in turn depends on both speed generated on the runway and the angle. Dombrowski was presumably slower than Powell and also had a higher angle, which means a higher proportion of his kinetic energy was used for vertical movement and there was less of it left to generate horizontal velocity in the air. Thus it's very possible he stayed in the air longer than Powell.

[tafnut]

the hang time for Soto in his WR would be same as the hang for Powell in his. (Soto projecting to actually come all the way back to earth.)That make any sense?

Since Soto jumped HIGHER, he'd HAVE to be in the air longer (says my 8th grade science education).

[gh]

... The last dominante euro type was Dombrowski. He had a hang time in the LJ that was like nothing anyone previous or since could match.

Huh! Unless I've lost all understanding of physics, hang time is directly related to distance jumped. Mike Powell had the best hang time, period.

Question for the physicists among us: somebody once told me that (assuming the WRs are about equal) that the hang time for Soto in his WR would be same as the hang for Powell in his. (Soto projecting to actually come all the way back to earth.)

That make any sense?

[AS]

Come on we know Beamon was the shooter in the grassy knoll.......... :roll:

I heard he was seen in the tunnel in Paris 10 years ago too... :roll:

[Track fan]

Come on we know Beamon was the shooter in the grassy knoll.......... :roll:

[gh]

I question whether it is even an "urban legend." Like gh, I've never seen it in print or heard it said that the jump was a foul.

I didn't make it up, but if you and gh never heard it, then it's assuredly false. What I remember reading (no idea where) was that just the tip of the shoe broke the plane and wasn't called a foul when they saw how far it was. Anyone recall whether his plant really was all the way up on the board? The jump is on Youtube, but you can't tell where his foot-strike is.

T&FN coverage says "hit the board perfectly." Moving along...

[Daisy]

I question whether it is even an "urban legend." Like gh, I've never seen it in print or heard it said that the jump was a foul.

Is it possible his tendancy to foul has been projected onto his famous jump too?

While looking around for any possible reference to such an urgan legend (found none) I came across these prose that really catch the moment well.

Source of this quote is the Sportstar Weekly (from the publishers of THE HINDU)

DOWN MEMORY LANE: The magic leap by GULU EZEKIEL VOL.29 :: NO.33 :: Aug. 19, 2006

For 20 seconds Beamon stood at the top of the runway, deep in thought and telling himself over and over again, "Don't foul, don't foul." Then he raced down the runway, hit the take-off board perfectly and sailed through the air effortlessly. He hit the sand so hard that he bounced up and landed outside the pit.

Instantly Boston knew it was special. He turned to Davies and said, "That's over 28 feet." Davies was stunned. "With his first jump? No, it can't be." The optical measuring device used to check the distance fell off the railing! An official muttered awe-struck, "fantastic, fantastic." An old-fashioned steel tape was called for. Then the distance was flashed on the electronic scoreboard: 8.90 metres. Beamon knew it was a record, but was unfamiliar with the metric system and had to check with Boston, who held both the Olympic and world records. Even as they embraced his compatriot told him, "Bob, you jumped 29 feet." The rest of the field was stunned. Ter-Ovanesyan said to Davies, "Compared to this jump, we are as children."

Davies, the defending champion, was crushed. "I can't go on. What is the point? We'll all look silly," he told Boston. Then in despair he turned to Beamon and said, "You have destroyed this event." By now the jump had been officially converted to 29 feet two-and-a-half inches and now the feat finally began to sink in.

[tandfman]

It is an urban legend. People got all excited because the wind reading was 2.0 mps as if that is rare--you see it about 10 times in any track meet. It ws not a foul.

Please give me one example of a meet other than Mexico where there were 10 readings of +2.0.

Or a meet other than Mexico where there were four World Records in the horizontal jumps (and another in the women's 200m) with wind readings of +2.0.

[tafnut]

I question whether it is even an "urban legend." Like gh, I've never seen it in print or heard it said that the jump was a foul.

I didn't make it up, but if you and gh never heard it, then it's assuredly false. What I remember reading (no idea where) was that just the tip of the shoe broke the plane and wasn't called a foul when they saw how far it was. Anyone recall whether his plant really was all the way up on the board? The jump is on Youtube, but you can't tell where his foot-strike is.

[Powell]

It is an urban legend. People got all excited because the wind reading was 2.0 mps as if that is rare--you see it about 10 times in any track meet. It ws not a foul.

Please give me one example of a meet other than Mexico where there were 10 readings of +2.0.

[tandfman]

I question whether it is even an "urban legend." Like gh, I've never seen it in print or heard it said that the jump was a foul.