Pole vaulting, one of the most exhilarating and technologically complicated events in track and field, is only pursued by the most daring of individuals. In pole vaulting a vaulter's goal is to clear, or get over, a horizontal bar at set hight. In a typical competition, a vaulter may make seven or eight jumps. During a jump, a vaulter is trying to convert his energy from his horizontal velocity and transfer it into vertical energy. There are many factors that effect the outcome of a vault. This makes it difficult to look at the cause of a mistake or error, for all the factors are interrelated to each other. By neglecting certain factors it makes it easier to see the physics behind the pole vaulting.
Suppose a vaulter sprints toward the pit at 7 m/s. When the vaulter reaches the pit, his pole launches him at an angle of 83 degrees with the horizontal toward the horizontal bar. In what time will the vaulter reach his peak? What height will this be? (Think of the vaulter as a projectile)
Consider your answer. What factors do you think would affect the height of a vaulter? (There are many!)
i believe the time it would take to reach the peak is 0.71 seconds and the maximum height would be 12.1 meters.
ReplyDelete12.1 meters seems way too high to me.
ReplyDeleteWell according to my calculations the time is indeed about .71 seconds! However, for the maximum height, I got 2.47 meters. A few factors that would affect height are initial launch speed, angle of launch, and the force of gravity.
ReplyDeletei also got tht for the height. but of the factors could b the angle at which the pole is bent. the more it is bent the less farther he will go but in return he should get higher
ReplyDeleteGood job Rose and big bad wolf your answers are correct. Hraldo I'm not sure how you came up with the answer 12.1 meters. I see you calculated the time right, which most likely means you either used the wrong formula or punched a wrong number into your calculation. As for factors the initial launch speed, and angle of launch (assuming the vaulter is a projectile) are good. I especially agree with the big bad wolf comment in regards of the angle of the pole. If you would like to see this in action there is a vaulter video in yale HS videos in the right margin of the blog
ReplyDeletefactors effecting would be gravity, height of vaulter, strenth and speed of the vaulter, form of the vaulter. etc.
ReplyDeletesome things that could affect the vaulters height could be gravity, wind, heavy or light clothing, the vaulters pole, and the vaulter in general.
ReplyDeleteDo you think the height and weight of a vaulter would be a factor that effects the height a vaulter jumps?
ReplyDeleteLove the video, great work. I truly believe the height and weight would be a factor.
ReplyDeletegreg...that was....awesome. i could see from my post on the balcony. but yes i agree with everyone else, 12.1 is most definately correct........ you dont like it....ill be watching...jk
ReplyDelete11.857 is the height i think. also, rad vid dawg!
ReplyDeleteGreg, you are the man. Show me how to pole vault like that!
ReplyDeleteI think that height, weight, the speed of the runner, what he is wearing, and his strength all have an effect on the height of the vaulter.
For those getting an answer of 12.1 meters. Think for a second that would equivalent to nearly forty feet! Maybe you should rethink your answer. If you have successfully calculated the time (.71 sec) here is how you would get the distance of the vault. "Once you have the time you should use the big D equation which is Distance = initial velocity * time + 1/2 acceleration * time^2 (Note that * means multiplication.)"
ReplyDeleteThen for those interested about the height and weight of a vaulter. Yes height and weight do play a role in the height achieved in a vault, however vaulters have developed a way to overcome this by developing poles with different flexibility to counter these factors. So is it a factor? yes. But does it affect the vaulters jump? in most cases no.
hmmmmm, yes forty feet may be bit of a stretch! i retract my statement of 12.1 meters, but would like to stick by the .71 seconds
ReplyDeleteyes I would agree with hraldo with the time being .71 seconds
ReplyDeleteYes i would also agree with hraldo with the time being .71 seconds.
ReplyDeleteshouldnt the way the vaulters body move or is positioned while he is going through the air make a differnece and affect the speed and time?
ReplyDeleteThanks for the great comments this week!
ReplyDeleteYes Ain that would make a difference which is going to lead us to Physics of Pole vaulting Part two once I have a post typed up.
ReplyDelete