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This mechanism shrinks when pulled

53,022 次观看 • 11 个月前 •via X (Twitter)

9 条评论

Veritasium 的头像
Veritasium11 个月前

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William Shipley 的头像
William Shipley11 个月前

The two springs start out in series, but when you cut the green string, they are in parallel on the other strings. After the slack is taken up, you have two springs that are stretched farther than they need to be to hold up the weight, and they pull up with more mechanical advantage than they had when in series. It only works because you trade out the energy in the spring tension for more potential energy in the height of the weight. Total potential energy is conserved.

Dw 的头像
Dw11 个月前

The weight will go up because the springs go from series to parallel.

Isaac 的头像
Isaac11 个月前

The auxetic material paradox, first described by Rod Lakes (1987), exhibits negative Poisson's ratio - contracting perpendicular to applied tension. Nature employs similar structures in cell walls and crystalline materials.

Ferarn 的头像
Ferarn11 个月前

Up, very slightly, is my guess, but almost the same height, because the weight gets distributed to the two springs equally instead of the top spring holding the combined weight the other spring and weight.

♦ ereliuer eteer ♦ 的头像
♦ ereliuer eteer ♦11 个月前

if you pull my hand, i can do that too

Jay Foreman 的头像
Jay Foreman11 个月前

PART 2 IS HERE ! 🗺️ @OrdnanceSurvey (Britain's best map makers) let @markcooperjones and me in their building, and we changed the map of Britain.

GoodTimesWithScar 的头像
GoodTimesWithScar11 个月前

I went outside

Brandon Herrera 的头像
Brandon Herrera11 个月前

Pardon my French, but @SenJackReed is a fucking moron. It’s embarrassing that the future of our country is being decided by people like this.

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