英语翻译A:The force of the earth,s gravitational pull acts vertically downwards on our bodies giving us weight.,wind forces,which can vary in magnitude,tend to push us horizontally,Force therefore possess magnitude and direction.At the same time,

英语翻译A:The force of the earth,s gravitational pull acts vertically downwards on our bodies giving us weight.,wind forces,which can vary in magnitude,tend to push us horizontally,Force therefore possess magnitude and direction.At the same time,
英语翻译
A:The force of the earth,s gravitational pull acts vertically downwards on our bodies giving us weight.,wind forces,which can vary in magnitude,tend to push us horizontally,Force therefore possess magnitude and direction.At the same time,the effect of a force depends upon its position.For example,a door may be opened or closed by pushing horizontally at its free edge,but if the same force is applied at any point on the vertical line through its hinges ,the door will neither open nor close,Thus we see that a force is specified by its magnitude ,direction and position and is therefore a vector quantity.As shuch it must obey the laws of vector addition,which is a fundamental concept that may be verified experimentally.
B:`Frequently in civil engineering construction beams are fabricated from comparatively inexprnsive materials of strength which are reinforced by small amounts of high-strength material such as steel,in this way ,a timber beam of rectangular section may have steel plates bolted to its sides or to its top and bottom surfaces,Again,concrete beams are reinforce in their weak tension zones and also,if necessary,min their compression zones ,by steel reinforcing bars,The design of reinforced concrete beams and concrete-and-steel beams is covered by Codes and relies ,as in thd case of steel beams,ultimate load analysis.

英语翻译A:The force of the earth,s gravitational pull acts vertically downwards on our bodies giving us weight.,wind forces,which can vary in magnitude,tend to push us horizontally,Force therefore possess magnitude and direction.At the same time,
答:地球的力量,s的引力行为对我们的身体垂直向下,给我们的体重.风力,这能够变化幅度,往往会把我们推横向联合,因此具有大小和方向的力量.与此同时,影响之力取决于它的位置.举例来说,一扇门都可以开启或关闭横向推自由边,但如果相同的力量是否应用在垂直管道上的任何地方通过它的铰链、门既不会打开关闭,所以我们也看到,一种力量已明确规定其大小、方向和位置,因此是一个向量的数量.作为shuch它必须服从法律的向量加法,这是一个基本概念,可以证明了这一点.
乙:“经常在土木工程施工梁相对inexprnsive材料制作的力量也增强了少量的高强度材料,如钢铁,用这种方法,一个木材矩形截面梁钢板用螺栓可能有其侧或其上下表面,再一次的,混凝土梁加固区与他们软弱的张力也,如有必要,他们通过压缩区最低,采用钢筋,设计的钢筋混凝土梁和横梁上满是concrete-and-steel代码和依靠的是,为压力容器的情况下,极限荷载分析钢铁横梁.