ADM-201 dump PMP dumps pdf SSCP exam materials CBAP exam sample questions

自行车的反直觉物理 – 译学馆
未登录,请登录后再发表信息
最新评论 (0)
播放视频

自行车的反直觉物理

The Counterintuitive Physics of Turning a Bike

如果你在骑一辆自行车并且希望右转,你可能想
If you’re riding a bike and want to turn right, you might think that you should turn
你应该把车把转向右方。然而,这是错的。
the handlebars to the right. However, that’s wrong.
因为,不像汽车,旋转车轮方向直接改变汽车的朝向
Because, unlike a car where turning the wheels merely changes the direction the car is pointed,
旋转自行车前轮会使其倾斜。当你将自行车前轮转向右方,
turning the front wheel makes a bike lean. When you turn the bike wheel to the right,
车轮转向右方,从你和车的其他部分右转,
the wheel goes to the right, right out from under you and the rest of the bike. So now
所以此时你向右偏,而从地面传给自行车的力量
you’re leaning to the left, and the force on the bike from the ground will be directed
向左,因此向左的力量使你偏左。
to the left, and a leftward force, of course, makes you go to the left. Since physics seems
既然力学使你左转,那你最好也放弃
determined that you’re going left, you’d probably better just give in and let the handlebars
并且使车把向左转。
turn to the left, too.
这就是为什么你骑在自行车上向左转——虽然开始时是向右转的。如果你真的想右转
And that’s how you turn left on a bike – by first turning right. If you really wanted
那你开始时就应该“反向操纵”向左
to go right, you should have started by counter-steering to the left.
当你最终让你右转后,你应该持续工作让你保持右转
Once you finally get yourself into a right turn, you’ll also need to work to keep yourself
因为大多数自行车和摩托车有自动保持平衡和直行的趋势
in the turn, since most bikes and motorcycles have a tendency to automatically stabilize
这因为一个右斜的自行车自动
and straighten out on their own. This happens because a right-leaning bike automatically
更向右转使车轮回到他重心的下方
steers itself even farther to the right to get the wheels back underneath its center
所以你实际上需要一个轻微向左的扭矩
of mass, so you’ll actually need to apply a slight torque to the left to keep the wheels
使轮子无法向右太远。
from turning too far to the right.
是的,这是违反直觉的:骑自行车时想要右转就左转,
Yes, it’s counterintuitive: to turn right on a bike you turn left, then keep trying
想要左转就右转,自行车真奇怪
to turn left while leaning and turning right. Bikes are weird.

发表评论

译制信息
视频概述
听录译者

收集自网络

翻译译者

收集自网络

审核员

自动通过审核

视频来源

https://www.youtube.com/watch?v=llRkf1fnNDM

相关推荐