一洒水车以等加速度a=0.9807 m/s2在平地行驶，水车静止时，B点的位置为x=1.5 m，水深h=1 m，运动后该点的水静压强为（）https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/a6d6a260dade47a98949dc5c8785e1a9.png
举一反三
- 一圆柱形闸门,长l=10 m,直径D=4 m,上游水深h1=4 m,下游水深h2=2 m,求作用在该闸门上的静水总压力的大小与方向为（）https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/c9bf93831c184ca6bcb8c0fa3bcbad78.png
- 正方形板ABCD作平移，A点的运动方程为：xA=60cos(2t)，yA=40sin(2t)，点M沿AC以s=30t2（x，y，s以mm计，t以s计）的规律运动，则当时，点M的相对加速度大小为________mm/s2，牵连加速度大小为_________mm/s2。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/2126d0bb600241d38ecd4e211f72d2e8.png
- 若DpM¢=±0.2，初始浓度为c mol‧L-1的金属离子M能被等浓度的EDTA标准溶液准确滴定(|Et|£0.1%)的条件为（ ） A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/33c9302962c34933b4b5815f152867a7.png"/> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/c00c0ec7848542fbb5bbd3d6877b704f.png"/> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/6700752bb87749a1abc50478ead98ee1.png"/> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202002/9820acf95f2543cd94adcb5a8f9b3f7e.png"/>
- 设Zm= {0, 1, 2, …, m - 1}，<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202010/211f8e3b46b646598e53d85def442786.png" />是模m乘法运算，则(Zm, <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/202010/60da1bba21044182aebb1e783993e81f.png" />)是群.
- 一质点沿直线运动，运动方程为x(t) = 6t2 -2t3。当t = 1 s时，速度大小为（）m/s，加速度大小为（）m/s2。