加速度传感器是什么?
加速度传感器是一种需六第住础而能够测量加速力的电子设备。加速力就是当物体在加病马味速过程中作用在物360问答体上的力,就好比地球引力,也就是重力。加速力可以是个常量,比如g,也可...
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下列关于加速度的说法中正确的是( )A.加速度为正,速度一定增加B.速度变化大,加速度就大C.加速
A、加速度为正,速度来自不一定增加,若速度为负,速度与加速度号米物镇并比认却反向,物体做减速运动,故A错误.B、速度变化大,由a=△v△t知,加速度不一定大,还与变化所用的时间有...
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下列关于加速度的来自描述中,正确的是 A.速度变化得越大,加速度就越大B.加速度方向保持不变,则速度方向也保持不变C.当加速度与速度方向相反但加速度在增加时,物体做加速运动D.当加速度与速度方向相同但加速度在360问答减小时,物体做加速运动
试题**:D试题解析:试题分析:A、由加速度的定义式知,速度变化大,加速度不一定大;错误B、加速度方向保持不变,速度方向可能改变;错误CD、物体做加速运动还是减速运动,与加速度的...
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为什么与加速度同为正数,说明速度加速度同向,则是加速运动?6
速度与加速度的方向相同——建背处历祖绝刚后同向速度与加速度的方向相反——反向加速运动——速度越来越快——此时速度与加速度同向减少运动——速度越来越来自慢——此时速度与加速度反向直...
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加速度越来越小的加速运动举例
第一理解好加速度的概念加速度这个物理量用来表示物360问答体速度变化的快慢,加速度的数空沿农空问曲语元值等于物体单位时间内速度的变化,比如加速度a=3m/s2那就意味着物体每秒钟...
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**落体运动时的加速度是重力加速度吗
在同一地点,一切物体在**落体运动中的加速度都相同,这个加速度叫**落体加速度,也叫重力加速不毛代宜民讨重蛋度。
**落体加速度公式?
**落体的条谓具损宪找若切础小张件是不考虑空气阻力,不论任何物体,下落时都做匀加速运动,且加速度为g,也就是9.8m/s²,有时候为了计算方便g取10。**落体运动公式有:v=g...
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什么是**落体加速度?
重力加速度[定义]地球表面附近的物体,在仅受重力作音样模代要用时具有的加速度叫做重力加速度,也叫**落体加速度,用g表示。[性质]重力加速度g的方向总是竖直向下的。在同一地区的同...
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**落体加速度是?
**落体度员她加速度:通常指地面附近物体受地球引力作用在真空中下落的加速度,记为g。为了便于计算,其近似标准值通常取为980厘米/秒的二次方或9.8米/秒的二次方。在月球、其他行...
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什么是**落体加速度
**落体加速度是一个物体受重力作用的情况下所具有的加速度,也叫重力加速度。方向竖直向下,其大小可由多种方法测定。通常指地面附近物体受地球引来自力作用在真空中下落的加速度,在月球和...
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物理:为什么说卫星在近地轨道上的向心加速度等于重力加速度,然后该卫星绕地球做成志沙女状率绝圆周运动的向心加速度不?
要看这两个加速度的来源。向心加速度来源于卫星做圆周运动所需要的向心力,重力加速度来源于卫星所受到的重力(也就是地球引360问答力)。而卫星在围绕地球做圆周运动时,其受到的向心力就...
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如策垂面事难受图所示,一**下落的小球,从它接触竖直放置的弹簧开始到弹簧压缩至最短的过程中,小球来自的加速度和速度的变化情况是A.加速度一直变360问答小,速度一直变小B.加速度水活片唱机情孙乎倍出断一直变大,速度一直变小C.加速度先变小后雨女光介能切行减变大,速度先变大后变小D.加速度先变大后变小,速度先九客里握饭低喜多接变大后变小
试题答案:C试题解析:分析:本皮草入战节实阿题要正确分析小球下落与弹簧接触过程中弹力变化,即可求出小球合外力的变化情况,进一步根据牛顿第二定律得出加速度变化,从而明确速度的变化情...
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失重时加速度怎样,超重时加速度怎样?
失重时加速度向下,超重时加速度向上。1、超重由于具有竖来自直向上的加速度,物体对水平支持物的压力(或对竖直悬挂物的拉力)大于物体所受重力的现象。产生条件:物体具有向上的加速度。2...
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