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Subject:
If the Olympics were held on the Moon
Category: Science Asked by: raystas-ga List Price: $20.00 |
Posted:
28 Apr 2005 13:03 PDT
Expires: 28 May 2005 13:03 PDT Question ID: 515501 |
Taking into account the gravitational difference between the earth and the moon, what would the current Olympic records be if the athletes competed on the moon. Please include competitions such as javelin throwing, high jump, long jump, shot-put, discus, hammer throw and any others a researcher may want to look up and calculate. |
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Subject:
Re: If the Olympics were held on the Moon
Answered By: omnivorous-ga on 28 Apr 2005 16:00 PDT Rated: |
There is some precedent here, as Alan Shepard hit several golf balls on the surface of the moon, and reportedly they went a long way. After using a six-iron, Shepard reported that his last shot (of 3) went ?"miles and miles and miles." Also make sure that you note the javelin in the lunar picture, as apparently the javelin toss was also performed on this mission: Carl Koppeshaar??s Astronet Page ?Lunar Golf? http://www.xs4all.nl/~carlkop/golf.html The gravity on the moon is one-sixth that of the earth at 1.622 m/s^2 vs. 9.78 m/s^2 on earth (6.03 times the moon). So, objects would go 6.03 times farther. We?re ignoring wind resistance here for objects like golf balls or a shot ? but we?re ignoring the fact that the moon?s atmosphere is nil and it would be hard to breath anyway. Or that a space suit might be restrictive to the high jump. The International Olympic Committee (IOC) has a web page with all of the current records. We want the track & field records, which are under ?Athletics? on this page: IOC ?Records? http://www.olympic.org/uk/utilities/reports/level2_uk.asp?HEAD2=8&HEAD1=5 Here they are: EARTHBOUND High jump (1996) : 2.39 m Long jump (1968): 8.90 m Shot Put (1988): 22.47 m Discus (2004): 69.89 m Hammer throw (1988): 84.80 m Javelin (2000): 90.17 m LUNAR RECORDS High jump (1996) : 14.41 m (almost 47?) Long jump (1968): 53.67 m Shot Put (1988): 135.5 m Discus (2004): 425.4 m Hammer throw (1988): 511.3 m Javelin (2000): 543.7 ? more than half a kilometer (and about exactly 1/3 mile) Google search strategy: ?on the moon? golf ball Physical statistics from Wikipedia.com Search the IOC web page for Olympic records Best regards, Omnivorous-GA |
raystas-ga
rated this answer:
and gave an additional tip of:
$5.00
Great Job!! I'd love to see someone jump 14.41 m. We only need to figure out how to add an atmosphere to the moon... ;-) |
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Subject:
Re: If the Olympics were held on the Moon
From: omnivorous-ga on 28 Apr 2005 16:25 PDT |
Raystas -- Thanks for your kind words and the extra sum. I'd never seen the Alan Shepard story before and though it was priceless. Best regards, Omnivorous-GA |
Subject:
Re: If the Olympics were held on the Moon
From: mirrormn-ga on 29 Apr 2005 23:14 PDT |
This is a pretty good answer, but having just taken 2 years of AP Physics courses in high school, it seemed to me like simply multiplying everything by 6.03 would not be entirely accurate. I checked the basic projectile equations for distance and height and they worked out, but then I realized that the initial velocities for the projectiles would probably not be the same. For example, when a person attempts a high jump, they bend their knees and compress, then accelerate their upper bodies upwards. On the moon, due to the lower gravity, a jumper would be able to give their body greater acceleration during this jump preparation, so the high jump record for the moon would undoubtedly be even higher then 14.41m. If it is assumed a jumper can apply a certain force while jumping, and that his head is about 1 m lower when he starts jumping than when his feet leave the ground, then he would need to apply 3.39 times his weight in force upwards while jumping to reach a height of 2.39 meters on the earth. On the moon, this same jumper would be able to apply the same force upwards but against a weaker downwards force, leaving the ground 1.16 times as fast, and could therefore reach a height of about 19.5 meters. This is in no way an accurate model for a jumper on the moon; it is only an illustration of how a world-record holding athlete could potentially perform more than 6.03 times better on the moon. Summary for those who don't like reading model physics situations - an athlete would probably perform more than 6.03 times better on the moon. In the case modeled above, the theoretical athlete performed 8.16 times better on the moon (19.5 meter high jump). |
Subject:
Re: If the Olympics were held on the Moon
From: racecar-ga on 01 May 2005 23:26 PDT |
That is a good point, mirrormn. One way to explain it is to imagine 5 other people somehow climbed onto an high jumper's shoulders. On earth, if the athlete could even stand (doubtful, with say at least 750 extra pounds) he certainly couldn't jump--his high jump would be non-existent. Meanwhile, on the moon, the 5 extra bodies would just bring his weight back to normal earth weight, and aside from the awkwardness of 5 people piled on top of him, he should be able to jump just as high as he can on earth, which is much more than 6.03 * 0. On the other hand, your assumption that the energy output of the leg muscles is independent of the load is not valid either. If the resistance is too little, you can't supply as much energy, basically because there is not enough time for the muscles to develop their full force. One way to see this is to consider that if an athlete can throw a shot-put (16 lbs) 22 meters, and he can impart the same energy to a baseball (5 oz), he would be able to throw the baseball over a kilometer. |
Subject:
Re: If the Olympics were held on the Moon
From: jack_of_few_trades-ga on 02 May 2005 11:29 PDT |
Very good points by all, and since we're overanalyzing the situation... let's also consider that all of the mentioned events begin with the athlete running (or atleast moving in circles) and the speed at which he can run is affected by the gravity as well. On the moon, I'd imagine the top speed would be much lower than on earth. The long jump would be the most hindered by this fact. But it would definately negatively effect every one of the mentioned events. |
Subject:
Re: If the Olympics were held on the Moon
From: stapalhead-ga on 05 May 2005 21:53 PDT |
The fact that there is no air resistance would have a HUGE effect on the results. Even on Earth, there are adjustments that have to be made to marks set at altitude in sprints and jumps. Many of the best long jump performances have been at Mexico City due to the lower air resistance (and the lower gravity too). This would have the same effect on the hammer and shot on the moon as well, although not as dramatic as the effect of the jumps. The discus, however, would be hurt by the lack of atmosphere, as it actually generates lift. Discus throwers are actually aided by a head wind because of the increase in lift. So although those are good estimates, the jumps, disc, shot, and hammer would be better, and the discus would be worse. (I believe the jav would be better too, although I'm not entirely sure.) |
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