I could see this being much safer (and therefore more viable) than the Hyperloop.

Although I'm curious how it could ever be more efficient than just using an electric train.

As far as non-standard trains climbing steep grades, "cog railways" have existed over 150 years. (these aren't cable-pulled funiculars)

and, in truth, he actually does *have* hands... so maybe it should say "Scaling A Climbing Wall Without USING Hands".

Your video, Scaling A Climbing Wall With No Hands, has made it into the Top 15 New Videos listing. Congratulations on your achievement. For your contribution you have been awarded 1 Power Point.

Confused

1:12 looks like the raccoon was doing just fine climbing up to dry land on it's own.

The last bear was like F this! And ventured off to start a non-climbing colony.

Your video, Bear Cubs Climb Fence, has made it into the Top 15 New Videos listing. Congratulations on your achievement. For your contribution you have been awarded 1 Power Point.

Ahhh. Ok, my mistake. Sorry.
The Osman video was listed as El Capitan, not just partial. This video is so short, I didn't notice the difference.

Impressive, I didn't think anyone would ever beat Dan's time. That is some ballsy climbing.

Never say never. It would be one hell of a workout to climb that far, at speed, in one shot....then again, meth is a hell of a drug, so don't rule it out completely. ;-)

*nochannel
*WTF
*sports
*fear
*skillful

And---why the heck would you stop?? You can't outrun a bear; and you can't out climb it. You might JUST be able to stay in front of it downhill on a mountain bike.

Yep.

And inevitably on the highest branch that won't support your weight to climb out and retrieve it

Tags for this video have been changed from 'Devils Tower, Climbing, Nature, Amazing' to 'Great Big Story, Wyoming, Devils Tower, Climbing, Nature, Amazing' - edited by oritteropo

I guess the hint for these is the rotational test that they show at the first.

1) A sticky object that would let go like a wall crawler that climbs down a wall would create this effect. (see below)
2) You can't. As you approach infinite speed it would get very close. (see below)
3) The bike will move forward. (see below)
4) The outside parts of the wheels that overlap the rail. Also if the train has a flywheel that is larger than the wheel size the bottom of the flywheel would also always move backwards faster than the train was moving.

1) He says "what object is inside?" so I'm not sure a liquid would count. Also a viscous liquid would flow a slow rate and would probably not stop and start. You might be able to get a viscous liquid to stop and start if you had fins, but that still might just move slowly or gain enough momentum to roll fast without any flow.

2) A little excel calculation shows that the average velocity approaches twice the initial but will never hit it.

attempted m/s - total time - average m/s
1 100 1
2 50 1.333333333
3 33.33333333 1.5
...
200 0.5 1.990049751
201 0.497512438 1.99009901

3) I'm not sure if the parameters of this experiment are explained sufficiently.

If it is allowed to slip then no matter the mechanical advantage a hard pull should always be able to get the bike to skid back and defeat friction.

If the bike is not allowed to slip on the ground then I don't understand how it could ever move backwards, the only options would be that it doesn't move at all or it moves forward.

If it can't slip then the ratio of the pedal to the wheel is what is in question. Bikes only have gear ratios higher than 1 and the crank is smaller than the tire so the tire will always rotate more than the crank thus the bike should move forward.

I don't see a motor... there is no derailleur because he is riding a fixed-gear bike. you can also tell from the way the back wheel meets the frame (axle hole has wheel insert from back and is tightened to desired chain tension).

He probably avoids pedaling down fast decents for this very reason. rpm gets so high it no longer helps to pedal. I see people on fixies riding up and down mountains in my area, the real impressive part is how they climb UP the mountain in such a big gear.

This sort of thing is bullshit and just the beginning. WTF are people supposed to do to earn a living? .......sorry *climbs off soap box*

Nobody wants to hear these inconvenient truths. Corporations that do business with Walmart give their lowest quality grains and products. It's practically returning to feudalism. Here is your lower class food, peon. Let my massive wealth create another low paying job for you. Oh, college education? Here's a low paying shitty job for you, as well. Unless you like climbing corporate ladders by using other people as stepping stones. This world: brought to by the ruling sociopathic elite. Here's an anonymous reporting system for you to minimize and abuse people who violate your social order. You work faster than everyone else but you talked too much according to anonymous reports, tsk tsk, human resources reeducation after investigating that although you are a superior worker, you talk too much.

I hear the American Army's set to pay three billion for ten of these.

Seriously, though, it's pointless on the first floor, a ladder would work better on the second, and from the fourth on up it won't work at all. You're really badly exposed (especially after all that careful wall work getting into position) and the guy climbing has very little recourse if he's noticed before he clears the balcony (needs both hands to climb, can't duck back out of sight, he's a sitting target).

Skillful, yes, but it's more of a circus act than a practical method of entry.