取向右为正方向,一物体以2m/s初速度向右运动.第一秒内加速度为+3m/s2,(即a1=+3m/s2);第二秒内加速度为-7m/s2,(即a2=-7m/s2).问:两个加速度哪个大?两个加速度大小哪个大?为什麽?矢量比较大小
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/05 14:56:10
![取向右为正方向,一物体以2m/s初速度向右运动.第一秒内加速度为+3m/s2,(即a1=+3m/s2);第二秒内加速度为-7m/s2,(即a2=-7m/s2).问:两个加速度哪个大?两个加速度大小哪个大?为什麽?矢量比较大小](/uploads/image/z/6983893-37-3.jpg?t=%E5%8F%96%E5%90%91%E5%8F%B3%E4%B8%BA%E6%AD%A3%E6%96%B9%E5%90%91%2C%E4%B8%80%E7%89%A9%E4%BD%93%E4%BB%A52m%2Fs%E5%88%9D%E9%80%9F%E5%BA%A6%E5%90%91%E5%8F%B3%E8%BF%90%E5%8A%A8.%E7%AC%AC%E4%B8%80%E7%A7%92%E5%86%85%E5%8A%A0%E9%80%9F%E5%BA%A6%E4%B8%BA%2B3m%2Fs2%2C%EF%BC%88%E5%8D%B3a1%3D%2B3m%2Fs2%EF%BC%89%3B%E7%AC%AC%E4%BA%8C%E7%A7%92%E5%86%85%E5%8A%A0%E9%80%9F%E5%BA%A6%E4%B8%BA-7m%2Fs2%2C%EF%BC%88%E5%8D%B3a2%3D-7m%2Fs2%EF%BC%89.%E9%97%AE%EF%BC%9A%E4%B8%A4%E4%B8%AA%E5%8A%A0%E9%80%9F%E5%BA%A6%E5%93%AA%E4%B8%AA%E5%A4%A7%3F%E4%B8%A4%E4%B8%AA%E5%8A%A0%E9%80%9F%E5%BA%A6%E5%A4%A7%E5%B0%8F%E5%93%AA%E4%B8%AA%E5%A4%A7%3F%E4%B8%BA%E4%BB%80%E9%BA%BD%3F%E7%9F%A2%E9%87%8F%E6%AF%94%E8%BE%83%E5%A4%A7%E5%B0%8F)
xVNG~.[5rQGQ.*)JzY{M0&. 5!K3{+׃!VU(| m1ewmwN Gmx%}z,KE-X,RUoVv`:ߎK
Pdz+OE?߽]ZcC.ώ;4|g.*'~⽜.BR_,}"+`D2S6CJ ӼM/anq:ﺂzhis- iO
/'["뜂4fOuh'R[ILir j]}{ơLoW%4l/O齹}e3A\ĺN*Hn[*Q*^0)wSšGde$3g)
f%rY(G?-xbHD۞s!!i/2ii
SE,dE6?AFyou=7^5,U*%$:IҌÚ79h`tPaWHzPtQޥGRO{Iٗ;⎄XȈX6; QCl @X'܁TAE/Ǭ7й"fVORn%45,BC c)bXPa/ ^>=JxBp.AyU16{*,_W5?=șmo 8֘ DOh...E[~Ů)۹w픎:LE6X7"1*82i[yG*3O*)oa=zF;O 2oRC|`')zZ8adovψleoRj&]1P)U6"tu8hA+i}ӧ~~b㷟~}5\gyjY{"WQڠ{,kXY7'⹁ԙ\LU!F6mP`X.g!+]C\x)݈Ğab)KQ
ŧIx+