Well I'm a physics teacher, so I was looking forward to using this in my class. It's just a shame that it teaches nothing, and they got their calculations and units wrong.... More high quality content from the good folk that brought you the red bull video player.
@blahblahbikes as an engineering student I immediately suspected this might be the case and came straight to the comments so that I wouldn't have to waste my time watching it
@blahblahbikes, shouldn't be too hard to adapt into a cool problem for your students to solve though... Just have them calculate launch speed needed to clear X gap or how ramp angle affects their trajectory or what if Kelly started binging on burgers until next Rampage and put on 100lbs. Lot's of stuff you can do to make a simple projectile problem a lot cooler.
but now that I think about it, is there any way to increase your speed to make it matter? I guess you could throttle back if you are aimed for an over-shoot.
Too bad Google Glass was so dang expensive! I was invited to spend $1500 for my developer preview, passed along to every coder buddy I know and nobody wanted it at that price. There could be some sick applications with it though.
A company is working on a display called Gogglepal. There are a couple of different models but I think they start at around 150 USD. Still in preorder. Built for skiing but I don't see why they wouldn't work for mountain biking.
40 mph is 64kmph
72ft is 22m
Having no real concept of what the imperial measurements looked or felt like this puts in it into perspective of just how fucking gnarly it was.
"As he spots the landing, he stops the rotation to match its angle" I've never done a backflip in my life, and never will, but I'm pretty sure you can't stop your rotation? Otherwise no-one would ever overrotate a flip?
You can sort of dude slow down your rotation by opening up meaning stretch out make your body/bike bigger an to speed the rotation up it's the opposite make your body/bike small if that makes sense dude..??
He changes his body position to slow down / stall his rotation - but yes, its still ulitmatley down to sheer skill, timing/co-ordination and balls sthe size of jupitor!
Let's try to explain this properly...... When you rotate you have angular momentum, which is a product of how widely distributed your mass is and how fast you are rotating. If you concentrate your mass more, for example by pulling yourself closer to your bike, you will rotate more quickly. If you do the opposite, as in extend your arms and legs to push your bike further away, you will rotate more slowly. So, you can slow down your rotation to land a flip safely. You can't stop rotating completely; if you try, you'll turn into a gnome.
A way to experience this concept is to try it on an office chair. Spin the chair while sitting on it and extend your arms and legs then proceed to bring them close to your body. You will notice the change in angular velocity.
amazing... McGarry showed what is possible and one year later it was a "piece of cake" for several riders and Tom van Steenbergen almost succeed his frontflip attempt. What a progress for "our*" sport. ("our*" because they are a league for their own)
So he in order to clear the jump he has to be at 40 miles per hour but the guy says he lanches off the ramp at ALMOST 30 feet per second. 30 feet per second is 20.45 miles per hour...someone needs to go back to math class...
He had to be going somewhat slower off the lip, because going up the ramp trades some speed for some altitude. Or trades some kinetic energy for potential energy, if you prefer.
Losing half of his speed seems a bit much, but I'm too lazy to do enough math to say for sure.
I always wonder the same thing. Ken Block said he used an archery app to figure the speed and takeoff angle he needed for some of his jumps, but I've never heard of a biker talking about anything like that.
Given the consequences, I'm surprised someone hasn't built a radio-controlled contraption of some kind to check their math before they drop in. But then I have trouble judging my speed for ten foot gaps, so I just can't imagine eyeballing the run-in to a 50-footer and having any clue about where I'd land... You obviously won't be seeing me at Rampage any time soon. Unless someone's radio-controlled guinea pig needs a driver.
Why was the landing to a 72 gap jump so damn sniper? I counted 4 bike lengths, seems ridiculously short, but then again I don't hit jumps that big so what do I know?
No, it is not. Those are circus act stunts for numbnuts made for TV and advertising caffeinated drinks to pubescent boys like you.
Real professional riding is UCI world cup.
yeah, although the UCI world cup is sponsored in part by red bull, and a lot of riders are sponsored by energy drink companies. And it's kind of creepy for a 44 year old to be calling a 15 year old a pubescent boy
@Axxe So the UCI is the epitome of mtb? I think you've explained yourself entirely. Also, professional riding is whatever one does as a profession, no? The riders at rampage are some of the best bike handlers on earth, and if that rampage is not a real mountain you'd be happy to shred it right? Once upon a time, people like you had an issue with just DH, because they weren't riding up the hill so it wasn't 'real'. Do you watch UCI DH?
Just have them calculate launch speed needed to clear X gap or how ramp angle affects their trajectory or what if Kelly started binging on burgers until next Rampage and put on 100lbs. Lot's of stuff you can do to make a simple projectile problem a lot cooler.
take off at 11deg,
gap: 72ft
A) determine required launch speed
initial y: +91ft
B) assuming no energy is lost, must he brake tap?
C) assuming the landing is symmetrical to jump (169deg from horizontal), compute rotational spin for one flip (in rpm)
D) explain why a front flip has a higher rotational spin than a backflip
Imperial Units are such bullshit. So f'king stupid imo.
A simple example:
How many feet are in a mile?
How many meters in a kilometer...
So the UCI is the epitome of mtb? I think you've explained yourself entirely. Also, professional riding is whatever one does as a profession, no? The riders at rampage are some of the best bike handlers on earth, and if that rampage is not a real mountain you'd be happy to shred it right? Once upon a time, people like you had an issue with just DH, because they weren't riding up the hill so it wasn't 'real'. Do you watch UCI DH?