Strange that a hand crank would have the power to amputate someone's limb. Especially since the gear reduction doesn't seem to be all that high, there's just not that much friction in the system to overcome.

Geez ... crank up the cheese to 11 *promote Let's all hassle the Hoff!

Sunday morning, 9:30'ish -- someone's cutting stones for their driveway, neighbour's washing her car with music cranked up to 11...

As Marcuse said, "there is no free society without silence, without the internal and external spaces of solitude in which the individual freedom can develop".

No audio, so don't bother cranking up your speakers like I was doing. The next video will try and kill you.

Calling him out on #1, he asked "what is this Object (in the cylinder)?". Honey and ping pong balls are not a single object.

Also the bicycle question, you need a rear sprocket about twice the size (or larger) of the front one to negate the wheel/crank ratio. Only custom bikes made for this question would have that gearing...so technically he's right but no one will have those results. (Edit:with the possible exception of Krusty, because his crank may be larger than his tiny wheel)

3) it moves backwards because the force is applied to the entire system/bicycle. The wheel going backwards turns the gears and chain, rotating the pedal 'forwards' (rotating it in reverse). Because the wheel is much larger it travels much farther back than the pedal rotates forwards, even with 1:1 gearing the pedal actually travels backwards slightly compared to the ground, but in higher gears it gets much easier.
It's because the tire is so much larger than the crank, that makes it easier to rotate the tire than the crank even at 1:1, so it goes backwards.
It's counter intuitive, but I actually checked my work and yep, my bike went backwards in all gears....no sliding needed. Try it.

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.

Could be interesting.

I would normally say for something like this, it comes down to the graphical power of portable vs. console mode (and the footage in the video makes it seem like performance slowed to a crawl), but Nintendo have generally cranked out good first party games even on low spec hardware. 3rd party support might be a different question.

Also, the two controllers tabs separately split from the screen looks awkward as hell. Like seriously, the part where the guy was using it on the plane looked super awkward, almost like a parody video.

I hear pepper spray works wonders for getting cockroaches out of your upholstery.

...or cranking the stereo and climate control, locking the windows up and stepping out of the car. Once she reaches into the driver's compartment AT ALL, you can claim she's trying to steal the car and get medieval on her ass.

Now he just has to upgrade to the 6 crank and he'll be ready.

Hey-ay Birthday girl ... put on your best hot pink and crank up the happy music in your alternate universe as you break open a delectable box of assorted chocolates! Enjoy your special day Leah

I never broke a crank or pedal, but I did fold a number of rear wheels into tacos doing exactly this back in my riding days. I eventually learned to stop pedaling until I was done leaning hard in a turn, and to keep my inside pedal 'up'. I have also, at slower speeds, recovered from pedal grinding, but at these speeds he was hosed.

Looks like the orange rider grounds his inside pedal. Very dangerous. Avoidable, but once you ground it, a wipe-out is imminent, as it lifts the entire bike off the ground. Often breaks the pedal or the crank, to boot.

My first instrument was the drums and I would rather listen to my neighbor's dog bark all day then hear most drum solos. She's competent and has done her homework but it's still as formulaic and predictable as most drum solos are.

Now THIS is a drum solo, Dennis Davis was Bowie's drummer for a number of years and I still crank this 8 minute solo 40 years after it was recorded in 1976. I have yet to hear any musician top this solo on any instrument, for my money.
https://www.youtube.com/watch?v=pPk3_X00ld4

"When you crank it up in a stadium.....it can hurt."
I'm sold.
*quality musical advancement that has yet to be improved on 50+ years later.