作业帮物体转弯是速度为什么减小 最好用英文
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/05/14 19:04:34
物体转弯是速度为什么减小 最好用英文
1.A car of mass 750kg is being driven by Fred at a constant speed of 20m/s.
In order to maintain this constant speed,it is exerting a thrust force of 15kN.
Fred approaches a gentle bend in the road.Fred is able to maintain a
constant speed as he rounds this bend,but his velocity changes.Explain how
this is possible.
1.A car of mass 750kg is being driven by Fred at a constant speed of 20m/s.
In order to maintain this constant speed,it is exerting a thrust force of 15kN.
Fred approaches a gentle bend in the road.Fred is able to maintain a
constant speed as he rounds this bend,but his velocity changes.Explain how
this is possible.
The direction of the car's velocity changes when the car is driving at the gentle bend in the road. The car only has a normal acceleration , so the speed of the car won't change.
Hope my answer will be helpful.
Hope my answer will be helpful.
物体转弯是速度为什么减小 最好用英文
做加速运动的物体处于超重状态，与速度方向无关 火车转弯处外轨高于内轨，目的是减小轮缘与轨道间作用力
当汽车以速度V匀速转弯时,此时静摩擦力已经达到最大,若减小汽车速度,则汽车将作向心运动．为什么是错的?
负的加速度是指物体运动速度减小吗
加速度的方向与速度方向相反,物体运动速度一定减小吗?为什么?这里的速度方向指的是初速度方向吗?
加速度减小,速度也减小,为什么
物体加速度值减小,为什么?
请举例：物体加速度减小,速度增大是可能的.物体加速度增大,3Q
物体的加速度增大,速度反而减小,这里的这个速度是指什么?
为什么物体上升运动速度就减小,而下降时速度就增大.
物体加速度减小,速度反而增大
作用在物体上的力消失以后,物体的运动速度会不断减小为什么不对