英语中的speed和velocity,哪个是速度哪个是速率?今天翻看英文的物理课本,发现一个问题,书里提到speed is a scalar quantity(标量),velocity is a vector quantity(矢量),但speed是速度,velocity是速率,这和高中物理书上所说的速度属于矢量,速率属于标量不是相反吗?望高人指点....
1. What is the best description of the difference between speed and velocity? Velocity is used in race car driving, while speed is used in physics Velocity is a quantity that requires distance over time along with direction while speed is a quantity that requires distance over time only Velo...
In the field of physics, velocity is a vector quantity, meaning it has both magnitude and direction. This distinction is important because it allows scientists to accurately describe the motion of objects in three-dimensional space. By specifying both the speed and the direction of an object's ...
Speed is only dealing with scalar quantities, which means it only has units like metres, kilometres, etc.Velocity is a vector quantity, which means it must includes directions such as south, north, east, west etc.Hope this may help you a little bit.
Velocity is a vector quantity: it has both magnitude and direction. Speed is the magnitude of the velocity: no direction is associated with speed. 2. (b) 3. (c) 4. 144 ft; 96 ft/s downward; zero 5. 4 s; 12 ft 6. 450 m/s2 7. The magnitude of A→+B→ is 32 units and ...
Speed, being a scalar quantity, is the rate at which an object covers distance. The average speed is the distance (a scalar quantity) per time ratio. Speed is ignorant of direction. On the other hand, velocity is a vector quantity; it is a direction-awar
在日常用语中，这两个词没有区别，可以通用。而在物理学里，velocity 是一个矢量(vector quantity)表示起点与终点间直线距离的长度除以所用时间所得的量，并注明方向：而 speed 是一个数量(scalar quantity)，是指起点到终点所走过的所有路程除以所用时间所得的量，且不标明方向。
Velocity is a vector quantity that denotes “the rate at which an item changes location.” Consider a person who takes one step forward and one step back at a quick pace, constantly returning to the same starting place. While this would cause a flurry of activity, it would also result in...
Explain why velocity is a vector quantity. How to calculate velocity? Explain why motion in a circle involves constant speed but changing velocity. Distance and Displacement, Speed and Velocity Examples: 1. A girl walks 210m in two minutes. Calculate her average speed. 2. A cyclist travels ...
一楼说错了……速率是路程/时间，就是移动路线的长度/时间，没有方向。速度是位移/时间，就是两点间的距离/时间，有方向。如果是曲线运动，两个值就不同了。比如40秒跑完400m跑道，速率是10m/s，速度是0 简单