第92期:违反直觉的物理学
日期:2020-08-19 16:15

(单词翻译:单击)

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If you're riding a bike and want to turn right,
如果你骑自行车,想向右转,
you might think that you should turn the handlebars to the right.
你可能会认为你应该把车把向右转oq0-!pC^C[6l
However, that's wrong.
但是,这是不对的zOgCZgEi%+4C=Y0
Because, unlike a car where turning the wheels merely changes the direction the car is pointed,
因为,自行车不同于汽车,转动汽车车轮只会改变指向的方向,
turning the front wheel makes a bike lean.
转动前轮会使自行车倾斜WsH4CB%!-Pj%
When you turn the bike wheel to the right,
当你把自行车轮子转到右边,
the wheel goes to the right, right out from under you and the rest of the bike.
轮子就会转到右边,此时的轮子位于你身体和自行车的其他部分的右下方Fra0HM(X77I1a1|(a
So now you're leaning to the left,
此时你的身体正向左倾斜,
and the force on the bike from the ground will be directed to the left,
从地面施加在自行车上的力会指向左边,
and a leftward force, of course, makes you go to the left.
而向左的力,当然,会使你向左边移动KDXN=eyW05|+
Since physics seems determined that you're going left,
由于物理学的因素似乎决定了你要往左转,
you'd probably better just give in and let the handlebars turn to the left, too.
你可能最好还是屈服吧,将车把也转向左边Bk)K@CzFIG5JQ5FFeU
And that's how you turn left on a bike – by first turning right.
这就是你如何在自行车上通过第一次右转实现左转SxUNM9pVdm

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自行车

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If you really wanted to go right,
如果你真的想往右转,
you should have started by counter-steering to the left.
你应该从左转向开始_Y[@pSkYe#lis_n(
Once you finally get yourself into a right turn,
一旦你最终进入右转状态,
you'll also need to work to keep yourself in the turn,
你也需要努力保持在转弯状态,
since most bikes and motorcycles have a tendency to automatically stabilize and straighten out on their own.
因为大多数自行车和摩托车都能自动稳定和校正方向CIDa|dXIm4kzq)
This happens because a right-leaning bike automatically steers itself
发生这种情况是因为右倾的自行车会自动
even farther to the right to get the wheels back underneath its center of mass,
向右转向更远,使车轮回到它的重心下,
so you'll actually need to apply a slight torque to the left
所以你实际上需要向左施加一个轻微的扭矩,
to keep the wheels from turning too far to the right.
以防止车轮向右转得太远5~atyv9Nft^Hm
Yes, it's counterintuitive: to turn right on a bike you turn left,
是的,这是违反直觉的:骑着自行车向右转,
then keep trying to turn left while leaning and turning right.
然后继续尝试向左转,同时倾斜并向右转vTM-dW]rAAO
Bikes are weird.
自行车真的很奇怪U4%Kw)qGjZ]rs7V

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