now comes my last part, and that is, how does air drag influence trajectories?
现在是最后一部分,就是,空气阻力如何影响轨道?
that's not bad, so this takes the air drag into account, and it is not even an approximation.
并不糟糕,算上了空气阻力,这甚至不是一个近似值。
in this paper, the influence of thrust and air drag on rocket lateral vibration is studied, and the frequency reduction under the thrust and drag is analyzed.
在进行高山滑雪运动时,雪板与雪地之间的摩擦力、空气阻力以及推雪阻力都是影响高山滑雪运动员滑行阻力的主要因素。
because of its dense nature, a large mass can be formed into a small space, minimizing air drag and reducing energy loss.
由于其密集性质,一个大集体,可形成一个小空间,减少空气阻力,减少能源损耗。
one weak wind conditions, surface pollution mainly related to brownian motion and turbulent diffusion, under strong wind mainly associated with the air drag force.
其中弱风环境下,表面积污主要与布朗运动和湍流扩散相关,强风环境下主要与气流曳力相关。
i can never take air drag out.
我无法消除空气阻力。
reduces air drag and thus also fuel consumption.
减少空气阻力,从而降低燃料消耗。
dave so i asked dave, "what is the effect of air drag on this apple?
所以我问,“空气阻力如何作用于苹果?
there is air drag on that tennis ball.
网球受到空气阻力。
that never changes if there is no air drag or air friction of any kind.
它未曾变过,如果没有空气阻力,或任何摩擦力。
the analysis of aerodynamic force data shows that differ front shape is very important to aerodynamic force. for example, coach model air drag coefficient can be lowed to 0.5759 from 0.7509.
试验数据分析结果表明,不同客车前部造型对气动力影响非常显着,如通过改善造型可使空气阻力系数由0.7509降为0.5759。
of course, in reality, the baseball player knows better they give effect to the ball, they deal with air drag they spin the ball, and then these equations are not valid.
当然,还是棒球选手更了解现实情况,他们用特殊的抛球方式减小空气阻力,他们使球在飞行时带自转,这些公式就无法应用了。
of course, then they open the parachute and then the air drag increases enormously and then they slow down even further.
当然,当他们打开,降落伞,空气阻力剧增,他们下降的更缓慢。
however, if you could jump up way - near the top of the atmosphere-- - where the air drag is negligible-- then you would be weightless for quite some time.
而且由于空气阻力,不可能完全失重-,不过如果十分接近大气层顶端-,那么空气阻力便可以忽略。