If you wake up one morning with 1,000 times the strength you had the night before, how will you handle delicate day-to-day tasks? Everything must seem so fragile to you since the scale of your strength has expanded one thousand times. You'd have to be very careful when you're shaking someone's hand so you don't end up breaking their bones or crushing everyone you hug. And using a fork to pick up a piece of broccoli from a Styrofoam plate without driving the fork through the plate is going to be as difficult as brain surgery. Say the day comes and you get the chance to save a damsel in distress falling from a helicopter. So, you hold out your arms, hoping to catch her. Seconds later, you will find yourself holding her lifeless body. What happened? Well, pressure is force divided by area. The smaller the area, the bigger the pressure. This is why we can lift heavy objects without breaking our skin, but a tiny needle can make us bleed with just a little poke. The pressure that will be exerted on her body can be calculated by force divided by the area on the top of your arms that comes in contact with her. It doesn't matter if your arms are strong enough to catch her body without breaking your bones. Her spine is not strong enough to be caught by you without being damaged. Even if you rip off the nearest door to provide a bigger area to catch her with, you still wouldn't be able to save her anyway. Remember, it's not the fall that kills her, but the sudden stop at the bottom. Let's say she's falling from a 32 story building, about 300 feet, and you are 6 feet tall, maybe 10 feet on your tippy-toes, with your arms above your head holding a door, in hopes of distributing the pressure across a larger surface area, but all you're doing is essentially moving the ground up by 10 feet. So, she's now falling from 290 feet, instead of 300 feet, reaching the speed of 173 feet per second just before impact, not counting air resistance. It's the equivalent of crashing at 94 miles per hour into a wall with a door in front of it. The only thing that could save her is flying. But that power comes with its own host of scientific issues. If you could fly, what you must do is fly up to her, start flying down at the speed she is falling, hold on to her, then gradually slow down until you come to a complete stop. This process requires a lot of cushion space between the point she starts falling and the ground. Every second you waste on changing into your superhero costume and flying up to her height, her head is getting that much closer to the pavement! If she's falling from a high place, and you can't get to her until she's only a few feet above the ground, there's really nothing you can do other than magically turn the pavement into marshmellow to allow her enough time to slowly come to a stop. Then, break out the chocolate and graham crackers and you've got s'mores. Mmmm, delicious! Now, which superpower physics lesson will you explore next? Shifting body size and content, super speed, flight, super strength, immortality, and invisibility.
如果你有天早上醒來 發現力氣比昨晚睡前大上一千倍 你會怎麼應付日常生活呢? 每個東西對你來說都太脆弱了 因為你的力氣 已經變大了一千倍 在跟別人握手的時候 你必須非常小心 免得弄斷了他們的骨頭 或是擁抱別人後 讓他們變得支離破碎 看到塑膠盤上的甘藍菜 想叉一塊來吃 又不想將盤子戳破 也會像開動腦手術一樣難 假設有一天 有個女孩不幸掉出直升機 而你有機會救她 於是,你用力挺起雙臂 希望能接住她 幾秒之後,你會發現自己 抱著她失去生命的身體 發生什麼事了? 嗯,壓力是力除以面積 面積越小 壓力越大 這解釋了為什麼我們可以舉起沉重的物品 而不會損傷皮膚 但一根針只要戳一下 我們就會噴血 要計算她身體所承受的力量 可以將力量 除以你手臂上方 和她接觸的面積 你的手臂夠不夠強壯 能否不骨折就接住她並不重要 問題在於她的脊椎不夠堅強 所以沒辦法被你接住而不受傷 即使你把身邊的門拆下來 使用更大的面積來接住她 你還是沒辦法救她一命 記住,讓她沒命的並不是從高處跌落 而是在地面突然停下來 假設她從 32 層樓高的建築跌下來 這大概 300 呎高(約 91 公尺) 然後你身高 6 呎(約 180 公分) 掂著腳尖高舉門板 (這大概 10 呎,約 3 公尺) 一心希望 這樣能將壓力 分散到更大的面積 但你只是把地面 抬高了 10 呎(約 3 公尺) 所以她現在從 290 呎處(約 88 公尺) 而非 300 呎處(約 91 公尺)落下 如果不算風阻的話 在撞上地面前 她的速度會是每秒 173 呎(約 52 公尺) 這相當於以時速 94 英哩(約時速 150 公里) 撞上正前方的門 唯一能拯救她的是飛行能力 但這項能力也有一堆科學問題 如果你真的能飛 你必須先飛到她上方 然後以她墜落的速度向下飛 抱住她 接著慢慢減速 直到你倆完全停下來 在這段過程中,從她跌落的地方到地面之間 必須有很大的緩衝空間 在你換穿英雄裝 以及飛到她所在高度 所經過的每一秒裡 她的頭都不斷地朝人行道逼近! 如果她是從高處墜落 而在她離地只剩數呎前 你還接不到她的話 你真的是無能為力 除非你能神奇地將人行道 變成棉花糖 讓她有足夠的時間慢慢停下來 然後,加上巧克力跟全麥餅乾 就有巧克力棉花糖餅乾了 嗯~~~好吃! 好,接下來,你想上 哪一堂超能力物理課呢? 改變身體的大小及組成 超快的速度 飛天能力 超強力量 長生不死 還有 隱形能力