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如图所示,系统置于以
加速度上升的升降机内,A. B两物块质量均为m,A所处桌面是水平的,绳子和定滑轮质量忽略不计.若忽略一切摩擦,则绳中张力为
A. 
B. 
C. 
D. 
学科：大学物理C（2023-2024第一学期）
时间：2023-11-08 06:32:28
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题目1单选题
复制题目 一质点在 OX轴上作简谐振动,振幅 A=4cm,周期 T=2s,其平衡位置取作坐标原点.若 t = 0时刻质点第一次通过 x = -2cm处,且向 X轴负方向运动,则质点第二次通过 x = -2cm处的时刻为( )A. 1sB. <img src="https://tihai-oss-cloud.itihey.com/img/3b6398565f343159c916df8094e6629e.png">s C. <img src="https://tihai-oss-cloud.itihey.com/img/008eef82bf8d7b0e75e7996f36660d60.png">sD. 2s
题目2单选题
复制题目 质量为0.25kg的质点,受<img src="https://tihai-oss-cloud.itihey.com/img/06d1c6e1ff8661fcb651f115ddfb2324.png">(N)的力作用,t=0时该质点以<img src="https://tihai-oss-cloud.itihey.com/img/930939dd0d5e8900a2ddb8e818cfe1a5.png">=2<img src="https://tihai-oss-cloud.itihey.com/img/fddcc9625d8fd4fe2a3a41da14f111bb.png">m/s的速度通过坐标原点,则该质点任意时刻的位置矢量是A. <img src="https://tihai-oss-cloud.itihey.com/img/ed6158854d9cfda9bd8338d2903ca2aa.png"> (m)B. <img src="https://tihai-oss-cloud.itihey.com/img/b4ca069fe26b11ef9eabebfd91f6cf3c.png"> (m)C. 条件不足,无法确定D. <img src="https://tihai-oss-cloud.itihey.com/img/83af03dc69cc46646e416834095d05fa.png"> (m)
题目3单选题
复制题目 一个平面简谐波沿x轴负方向传播,波速为u=2m/s,原点处质点的振动频率n =2.0Hz,振幅A=0.1m,且在t=0时恰好通过平衡位置向y轴负方向运动,则此平面波的波动表达式为( )A. <img src="https://tihai-oss-cloud.itihey.com/img/522161ebbe9c44e06ffd56a0bc6f26ce.png"> (m)B. <img src="https://tihai-oss-cloud.itihey.com/img/f9b1e5f0c2bb358c1b1487a5cae5c5bb.png"> (m)C. <img src="https://tihai-oss-cloud.itihey.com/img/a671e323ede749ec8f1e559a45401cb9.png"> (m)D. <img src="https://tihai-oss-cloud.itihey.com/img/685ac4e7601aef8e7f9ac10b2d30b8c0.png"> (m)
题目4单选题
复制题目 两相干平面简谐波沿不同方向传播,如图所示,波速均为<img src="https://tihai-oss-cloud.itihey.com/img/57a7ab67476c6c05b1950bee64422b7d.png">0.40m/s,其中一列波在A点引起的振动方程为<img src="https://tihai-oss-cloud.itihey.com/img/5a9afbaf7d22c053469893cc06d7b078.png">,另一列波在B点引起的振动方程为<img src="https://tihai-oss-cloud.itihey.com/img/d0f90d47d0296481953969ee733ff9c9.png">,它们在P点相遇,<img src="https://tihai-oss-cloud.itihey.com/img/57b05f6c588b6feae193b181e792aedd.png">0.80m,<img src="https://tihai-oss-cloud.itihey.com/img/1f087028f2398e9757272f4210a01eac.png">1.00 m,则两波在P点的相位差为( )<img src="https://tihai-oss-cloud.itihey.com/img/9131987be20edcbbf06789b21caaa4ca.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/b71b9137bca84b05ec976f35aa028200.png">/2B. 0C. 3<img src="https://tihai-oss-cloud.itihey.com/img/b71b9137bca84b05ec976f35aa028200.png">/2D. <img src="https://tihai-oss-cloud.itihey.com/img/b71b9137bca84b05ec976f35aa028200.png">
题目5单选题
复制题目 <img src="https://tihai-oss-cloud.itihey.com/img/bdcb170ade30b86b491ac5bd41374361.png">一辆轻质小车上装有光滑弧形轨道,总质量为m,放在光滑水平面上,有一质量为m,速度为v的铁球,沿轨道水平射入,并沿弧形轨道上升,则铁球沿弧面上升的最大高度为A. <img src="https://tihai-oss-cloud.itihey.com/img/da5fce9954dec3096680c361cd3d2f9c.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/e31cd384bd1e16832fe86899e98bad5b.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/483ad81f30e49c4809e9ad758a5809dc.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/ba89f32138c83dd5ca2dd4a8c5ab3f81.png">
题目6单选题
复制题目 质点做曲线运动,<img src="https://tihai-oss-cloud.itihey.com/img/fa2e27629c99636c220c4bac01c26614.png"> 表示位置矢量,<img src="https://tihai-oss-cloud.itihey.com/img/90b4d7145f196990e6c75c7a79e0db1b.png"> 表示速度,<img src="https://tihai-oss-cloud.itihey.com/img/076853d0e2b7c17f1fdfd4a6225f5bc0.png"> 表示加速度,<img src="https://tihai-oss-cloud.itihey.com/img/5a45bb8015733e66d0cb0a32881aea0a.png"> 表示路程,<img src="https://tihai-oss-cloud.itihey.com/img/d2461e9b891ce3f9af03684e089e4e81.png"> 表示切向加速度,对下列表达式,即(1)<img src="https://tihai-oss-cloud.itihey.com/img/b0ca16813250bbfde7decca7567508d1.png"> (2)<img src="https://tihai-oss-cloud.itihey.com/img/7c643b42c430df897dbd67294e88f8e8.png"> (3)<img src="https://tihai-oss-cloud.itihey.com/img/054d02bfd4e930e644604e6343600dde.png"> (4)<img src="https://tihai-oss-cloud.itihey.com/img/42b880d23eaed0e6055420578b47d69b.png">下列判断正确的是( )A. 只有(2)(4)是对的B. 只有(1). (3)是对的C. 只有(3)是对的D. 只有(2)是对的
题目7单选题
复制题目 <img src="https://tihai-oss-cloud.itihey.com/img/bc171653f5144bd5a1c955e17973e408.png">如图所示,系统置于以<img src="https://tihai-oss-cloud.itihey.com/img/85999012a26479080479a73519a18b83.png">加速度上升的升降机内,A. B两物块质量均为m,A所处桌面是水平的,绳子和定滑轮质量忽略不计.若忽略一切摩擦,则绳中张力为A. <img src="https://tihai-oss-cloud.itihey.com/img/42ee3d180d9173e9d05f77ff2bbe7917.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/a8bcd62da3cecc688c08ba83324b81e5.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/2339bfd01356ba4b51f4c6fbfd151ad8.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/1e6f1d2e6e760cacfcc7f7c672443039.png">
题目8单选题
复制题目 质量为 m的质点在外力作用下,其运动方程为<img src="https://tihai-oss-cloud.itihey.com/img/477a2fc16057fae71f4a1b1f0951b9ec.png">=Acosw t<img src="https://tihai-oss-cloud.itihey.com/img/b3917d992571b1edcaf193cb441cf3ac.png">+Bsinw t<img src="https://tihai-oss-cloud.itihey.com/img/fddcc9625d8fd4fe2a3a41da14f111bb.png">. 式中B. w 都是正的常数.则力在 t1= 0到t2= <img src="https://tihai-oss-cloud.itihey.com/img/7e0cc836e6b04e211140334479d8fea9.png"> 这段时间内所作的功为A. mw2 (A2+B2)B. <img src="https://tihai-oss-cloud.itihey.com/img/5d0982e42eb2373512fc0db7426ee545.png">mw2 (A2–B2)C. (A) <img src="https://tihai-oss-cloud.itihey.com/img/5d0982e42eb2373512fc0db7426ee545.png">mw2 (A2+B2)D. <img src="https://tihai-oss-cloud.itihey.com/img/5d0982e42eb2373512fc0db7426ee545.png">mw2 (B2-A2)
题目9单选题
复制题目 一竖直悬挂的轻弹簧下系一小球,平衡时弹簧伸长量为d.现用手将小球托住,使弹簧不伸长,然后将其释放,不计一切摩擦,则弹簧的最大伸长量A. 为2dB. 为dC. 为<img src="https://tihai-oss-cloud.itihey.com/img/1b1d247b05f6d3f254698b13dd91b0b9.png">D. 条件不足无法判定
题目10单选题
复制题目 一质点的运动方程是<img src="https://tihai-oss-cloud.itihey.com/img/6a7378cf7b649fd35f0140f166131fed.png">,R. <img src="https://tihai-oss-cloud.itihey.com/img/70e2a28cbb14915c77cf93dafa05d88b.png">为正常数.从t=p ¤w 到t=2p ¤w 时间内该质点的位移是A. -2<img src="https://tihai-oss-cloud.itihey.com/img/8eef8d19ccb0fd020d877d935503633b.png">B. -2R<img src="https://tihai-oss-cloud.itihey.com/img/6b4899272a35446035d560173fa99b31.png">C. 2R<img src="https://tihai-oss-cloud.itihey.com/img/6b4899272a35446035d560173fa99b31.png">D. 0
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