Top Gear. Top Gear(youtube.com).
N.p., n.d. Web. 12 Feb. 2013. <[https://www.youtube.com/watch?v=VdIjHlzJlr8
]https://www.youtube.com/watch?v=VdIjHlzJlr8>.
2nd Video: Mr. Splash:
Youtube.com. N.p., n.d. Web. 12
Feb. 2013. <https://www.youtube.com/watch?v=kvY9jTDTrFg>.
3rd Video: Bright Storm Free-Fall Explained!
Free Fall. Time-saving Fall.
N.p., n.d. Web. 12 Feb. 2013.
<http://www.brightstorm.com/science/physics/linear-and-projectile-motion/free-fall/>.
Analysis of 1st and 2nd
videos
In the first video, there is a race between a ford
Velociraptor and a HALO jumper. The ford must travel a horizontal distance of 5
miles, and the HALO jumper must travel a vertical distance of 5 miles. The HALO
jumper has a terminal velocity of about 120mph. Traveling about 5 miles at
120mph means that the jumper is falling for about .04 hours, or about
2.5minutes. The ford also must complete the course in 2.5 min in order to meet
the HALO jumper, as seen in the end of the video. However, the video states
that the ford must reach the finish line in 4 minutes. This is the first
inconsistency in the video. The video states that the ford must average at
about 71 mph. When 4 minutes is converted to hours (about .07hours), the total
distance comes out to about 5 miles. One factor that could cause the HALO
jumper and the ford to finish neck in neck is the fact that the jumper must
pull his shoot at about 2000ft. This would mean that the jumper would be
falling at 120mph for 23000ft. 23000ft is equal to 4.6miles. This equates to
the jumper falling at terminal velocity for 2.3 minutes. 2.3 minutes off of the
4 minutes the ford needed to complete the course would mean that the jumper was
falling the 2000ft for 1.7 minutes. His velocity would equate to about 14mph.
The video however stated that the jumper was traveling at an average of 60mph
with his chute pulled. Therefore, we believe that this video is not a true
simulation due to the inconsistences found. If the video were accurate, the
HALO jumper would have reached the finish line much faster than the ford
Velociraptor.
The second video deals with a smaller amount of distance to
fall than the previous one. It shows a “Mr. Splash” jumping off of a 30 ft.
platform taking about 3 seconds to land in a kiddie-pool about 14 inches deep.
He is able to not be injured at the end of this video because when he lands he
propels himself forwards into the inflated plastic pool in front of him which
absorbs much of his momentum therefore allowing him to walk out of the kiddie
pool unharmed from his fall. The kiddie pool absorbs 700 kg*m/s from “Mr.
Splash’s freefell from 30 ft. The fall
itself is about 3 seconds long but when he jumps up, he creates a period of
time where he is not moving down to the pool but accelerating upwards and has
less than a second of hang time. This effects the average velocity of the
entire fall because he is not accelerating downwards at all time when he is in
freefell. Unlike the first video, Mr.
Splash cannot reach his terminal velocity unlike the HALO jumper in the first
video. As you could possibly believe, the HALO jumper would not be able to
successfully land in a 14 inch pool and able to walk away from it without a
scratch as Mr. Splash did from the 30 foot drop opposed to one that is 5 miles.
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