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Which emoji scissors close (2020)

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Re: Which emoji scissors close (2020)

#41

Post by BugsJustFindMe »

ianferrel wrote: post #33
BugsJustFindMe wrote: post #16

Earlier quoted context omitted.

What you described misunderstands or at least poorly describes the problem. > Right, because which blade half is on the bottom affects which direction you need to apply force so the blades meet tightly. That would violate Newton's Third Law of motion, so no. You don't have to apply force in any different direction if you put scissors with symmetric handles in the wrong hand. You will, however, end up tilting the scis…

>You don't have to apply force in any different direction if you put scissors with symmetric handles in the wrong hand. Yes! You do! So scissors hinge on a pivot point, and they hinge in two dimensions. They mostly move in the dimension that they cut in, but they also move a little in the perpendicular dimension. And in order to bring the cutting edges closer , you move the handle ends farther away. If you're using t…

Your thumb and fingers of both hands are equally capable of producing both separating and joining force while closing. You learned to do it one way, by pushing out with your thumb and pulling in with your other fingers, so that way feels better to you, but that's a property of you not a property of scissors.

Re: Which emoji scissors close (2020)

#42

Post by krsrhe »

ianferrel wrote: post #33
BugsJustFindMe wrote: post #16

Earlier quoted context omitted.

What you described misunderstands or at least poorly describes the problem. > Right, because which blade half is on the bottom affects which direction you need to apply force so the blades meet tightly. That would violate Newton's Third Law of motion, so no. You don't have to apply force in any different direction if you put scissors with symmetric handles in the wrong hand. You will, however, end up tilting the scis…

>You don't have to apply force in any different direction if you put scissors with symmetric handles in the wrong hand. Yes! You do! So scissors hinge on a pivot point, and they hinge in two dimensions. They mostly move in the dimension that they cut in, but they also move a little in the perpendicular dimension. And in order to bring the cutting edges closer , you move the handle ends farther away. If you're using t…

It’s because people aren’t aware the 2nd dimension, the looseness of the connection between the planes of the blades, where the screw isn’t (and can never be) perfectly tight yet still allows the blades to slide. It’s hard to get the idea across in text. Your second comment helped a lot.

Re: Which emoji scissors close (2020)

#43

Post by dang »

culi wrote: post #17
cloudier wrote: post #3

Similar posts: - Ants: https://news.ycombinator.com/item?id=17555842 - Smiling faces: https://grouplens.org/blog/investigating-the-potential-for-m... - Butterflies: http://emilydamstra.com/news/please-enough-dead-butterflies/ - Trains: https://mobile.twitter.com/BisTheFairy/status/11925577307096... - Horses: https://twitter.com/jelenawoehr/status/1191872816372600832?l... - Planets: https://mobile.twitter.com/physicsJ…

This is an incredible collection. Thank you so much for keeping it

I still want to write some software to support community-curated lists of related links. It would include whatever I'm currently posting as "related"* plus fabulous contributions like cloudier's above.

* https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...

Re: Which emoji scissors close (2020)

#44

Post by bondarchuk »

dang wrote: post #43
culi wrote: post #17

Earlier quoted context omitted.

This is an incredible collection. Thank you so much for keeping it

I still want to write some software to support community-curated lists of related links. It would include whatever I'm currently posting as "related"* plus fabulous contributions like cloudier's above. * https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...

You often find these on github as "awesome-[something]" and accepting contributions as PRs.

Re: Which emoji scissors close (2020)

#45

Post by iforgotpassword »

OJFord wrote: post #20
sushid wrote: post #14

Earlier quoted context omitted.

Are you a lefty? I'm a lefty scissors user as well so I've gotten used to right hand scissors (you just push the bottom blade to the right as you cut). That may not be the case for most right handed folks since it "just works" most of the time.

No, right-handed, but left-handed were readily (read: overly) available at school so I recall trying them thinking surely it's just a comfort thing at most how could it possibly make a difference, and the paper or whatever just flopping up parallel to the blades instead of being cut.

That happens the other way round too, hence the workaround GP suggested. It's a little uncomfortable because you naturally push the other way while cutting, but you can get used to it.

When you use left handed scissors with your right hand, you apply some force to the blades that moves them slightly apart, while with right-handed ones, you force them together tightly. You need to actively work against that.

Re: Which emoji scissors close (2020)

#46

Post by cbm-vic-20 »

jasode wrote: post #28
BugsJustFindMe wrote: post #16

Earlier quoted context omitted.

What you described misunderstands or at least poorly describes the problem. > Right, because which blade half is on the bottom affects which direction you need to apply force so the blades meet tightly. That would violate Newton's Third Law of motion, so no. You don't have to apply force in any different direction if you put scissors with symmetric handles in the wrong hand. You will, however, end up tilting the scis…

> You don't have to apply force in any different direction if you put scissors with symmetric handles in the wrong hand. [...] But that's not the same as needing to apply force any differently. For precision made scissors with tight tolerances at the pivot joint and sharp blades (premium brands like Kai, Gingher, etc), it will cut with either hand. But for scissors with a loose rivet (like cheaper scissors very commo…

TIL: I've been using scissors wrong my entire life. I didn't realize that you need to push the handles to apply lateral force to the blades to make them slide against each other, the more the better.

Re: Which emoji scissors close (2020)

#47

Post by bondarchuk »

Joker_vD wrote: post #4

That's the first time I've heard that there are left- and right-handed scissors. Is there actually a noticeable difference in usage?

I just got the nearest pair of scissors and cut a sheet of paper with it, it was equally easy both with my left hand and my right. Even holding it very loosely so I couldn't secretly unconsciously apply some horizontal force it cut fine, as well as when tilted slightly left or right. The two halves seem perfectly identical, too, so I don't know what's this talk about "nearer blade on the bottom" either by some sibling comment, seems like both blades are about equally near and obviously one is on the bottom and the other on top.

So in short I have no idea what everyone's on about.

Re: Which emoji scissors close (2020)

#49

Post by schiem »

mrweasel wrote: post #31
Joker_vD wrote: post #4

That's the first time I've heard that there are left- and right-handed scissors. Is there actually a noticeable difference in usage?

You're going to love this then: There are left-handed bread knifes, and I want one. Bread knifes have a ever so slight slant to the cutting surface, to ensure that it actually goes straight through the bread. Without it the bottom of the slice will be a little more narrow, or thicker, I can't remember. Anyway, if your left handed the cut goes into the bread at an angle and the bottom get much wider than the top. This…

You have just answered why I've never been able to cut bread straight. I always thought I was just bad at it and somehow everyone else had mastered bread cutting while I wasn't paying attention.
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