1.一小球沿斜面向上运动,运动方程为S=5+4t-t²(SI),则小球动运到最高点的时刻是:A.t=4s B.t=2s C.t=8s D.t=5s2.一质点作匀速率圆周运动时,( )A.它的动量不变,对圆心的角动量也不变.B.它的动量不变,
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/10 13:37:51
![1.一小球沿斜面向上运动,运动方程为S=5+4t-t²(SI),则小球动运到最高点的时刻是:A.t=4s B.t=2s C.t=8s D.t=5s2.一质点作匀速率圆周运动时,( )A.它的动量不变,对圆心的角动量也不变.B.它的动量不变,](/uploads/image/z/1426197-21-7.jpg?t=1.%E4%B8%80%E5%B0%8F%E7%90%83%E6%B2%BF%E6%96%9C%E9%9D%A2%E5%90%91%E4%B8%8A%E8%BF%90%E5%8A%A8%2C%E8%BF%90%E5%8A%A8%E6%96%B9%E7%A8%8B%E4%B8%BAS%3D5%2B4t-t%26sup2%3B%28SI%29%2C%E5%88%99%E5%B0%8F%E7%90%83%E5%8A%A8%E8%BF%90%E5%88%B0%E6%9C%80%E9%AB%98%E7%82%B9%E7%9A%84%E6%97%B6%E5%88%BB%E6%98%AF%3AA.t%3D4s+B.t%3D2s+C.t%3D8s+D.t%3D5s2.%E4%B8%80%E8%B4%A8%E7%82%B9%E4%BD%9C%E5%8C%80%E9%80%9F%E7%8E%87%E5%9C%86%E5%91%A8%E8%BF%90%E5%8A%A8%E6%97%B6%2C%28+%29A.%E5%AE%83%E7%9A%84%E5%8A%A8%E9%87%8F%E4%B8%8D%E5%8F%98%2C%E5%AF%B9%E5%9C%86%E5%BF%83%E7%9A%84%E8%A7%92%E5%8A%A8%E9%87%8F%E4%B9%9F%E4%B8%8D%E5%8F%98.B.%E5%AE%83%E7%9A%84%E5%8A%A8%E9%87%8F%E4%B8%8D%E5%8F%98%2C)
xVKSG+:PHNl!`ήJrR`<%@`=lX"*?ڙ]|=Z$$%3=_#sԀGY=cg6wYvWvMjƃ"?i_
<گ3i r$|sk/6s4nh`><E|x&gkNN'X>ˮ;ʀ?`%J'*$6m8^@n>3O2zq?@ ?ܧ!?ȇ߮ͦ;~S[ħ
o8
{ڿe,}%
qʩƖ|@[=VM啗P$i,s:36OmgJA4e.djmG;;M:5Wų
[]C!?oIrceRןcON+
xG"; b̗|NfڱCX,x[[z0@$ _Ta
[Db3'"鮄+䰨|Yq>3lPc{{f/vg
gKOۧvLFΊM;W)@Ӎ)EVLxv*ٯ^z mT
/