第1187章 物理的胜利
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“动了动了！”
八千斤对于文官们大抵只是一个数字，可在见识到那些铁块的数量后，都在怀疑这四匹马能否拉得动。
四匹马一边两匹，开始有些艰难，可马车动了之后，那动作就变得轻松起来。
车夫就坐在车头上加的一个座位上，手中拿着马鞭，吆喝一声之后，马车渐渐加速。
“跑起来了！”
杨士奇坐过无数次的马车、牛车，知道马车的速度。
可这个马车拉了八千斤货物，还能跑的那么轻松，那么快，如若无物，如果是拉人呢？
就在这胡思乱想中，杨士奇听到有人惊呼道：“要冲出去了！”
马车的速度越来越快，可铁轨就那么长，要是冲出去，估摸着人马都得倾覆。
杨荣看了方醒一眼，却是云淡风轻。
故作玄虚！
“嘎……”
这时前方的马车传来了一声怪响，紧接着马车就开始减速了。
慢慢的，马车最后在铁轨尽头的前面一点停住了。
“咦！”
眼力比较好的刘观诧异的道：“这车夫都没下车，马车怎么停住的？”
华夏的马车、牛车源远流长，可刹车的方式却很寒酸。
第一种刹车方式，就是下坡前，车夫放下一根连着车厢的棍子，棍子上拉着绳子，车夫跑到车后面去拉着绳子，木棍就和车轮摩擦，这就是刹车。
而第二种就是全靠着车后面的一根‘刹车棍’，在要减速时，车夫下来，把车后倾，那根棍子就和地面摩擦，达到减速的目的。
可刚才车夫没下车啊！
走近些后，大家看到车夫依然在车上，顿时兴趣大增。
这些文武官员们出行大多是骑马，可家眷出行却不得不坐车。
这些年惊马的事儿没少发生，车夫完全来不及反应，只能拼命的拉缰绳。
若是能刹车的话，能省多少事啊！
方醒冷眼旁观着，看到刘观和蹇义，以及金幼孜三人走过去，然后蹲下来仔细看着车轮，寻找刹车装置。
而其他人，特别是武勋，包括了吕震，全都围在马车边上，仔细看着马车的构造，还有去检查铁轨的。
“这个是何道理？”
这四匹马拉的太轻松了，以至于大家认为两匹马也没问题。
朱芳被挤在外面，满头大汗的道：“陛下，这个是……”
“你进来说。”
大家闪开，朱芳进来，指着铁轨和车轮说道：“陛下您看，车轮是铸造的，有外缘，正好和下方的铁轨重合，这样运行起来的阻力非常小。”
“阻力？”
金忠一脸懵逼。
朱芳点头道：“是，就是阻力，重物压在车轮上，车轮和地面摩擦就是阻力，而这种轨道配合可以让阻力减少到最小，一旦起速，那惯性可就大了，马匹受力也小…...”
金忠还是一脸懵懂，朱芳无奈的捡起一块石头在地上摩擦着，说道：“若是没有铁轨，马车的车轮就是这样和地面摩擦，生出不少阻力。而铁轨和轨道相对平滑，阻力就可减小。”
“而且四个轮子，马匹就不用负重，只用拉车就好，这样不但是稳，而且还能节省马力。”
看着一群懵逼的臣子，朱棣面无表情的道：“这些都是谁教的？”
朱芳根本没想别的，脱口而出道：“这是书院里教的科学。”
寂静！
刚才还围着马车转悠的官员们仿佛是中了定身法，一动不动。
这个能节省时间，节省人力和耗费的发明，就是科学里面的东西？
朱瞻基说道：“皇爷爷，这个道理那本物理书上面就有，只要认真的学，勤动手，大多数人都能懂，说不准哪天有人能发明出更厉害的东西来。”
人人皆为尧舜吗？
群臣目光复杂，心中纠结。
朱棣淡淡的道：“大家都看看，看看这车还能干什么。”
于是乎，心中难受的群臣又开始了心不甘，情不愿的‘研究’。
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