Tsatoumas does it again, 8.54!!!

[Track fan]

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

[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:

[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?

[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).

[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.

[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

[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.

[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.

[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!