题库网 (tiku.one)

 找回密码
 立即注册

 

      

上传图片附件

未使用图片

小贴士: 允许的图片文件格式为: gif, jpg, jpeg, png, webp，上传完成后会在上方生成预览，用鼠标连续双击缩略图，或拖动缩略图，该图片就被绑定至本题，显示在题目下方

本次作答已使用

小贴士: 此栏目显示的是当前作答使用的所有图片，绑定到某一题目的图片同时会显示在该题目下方; 删除使用的图片会将其转移到<未使用图片>类别


习题练习：Physics Unit6: Work and Energy
本习题练习来源于题库网 (https://tiku.one)，是在线习题练习的打印版，您也可以访问本平台网站(https://tiku.one/)直接在线完成(注册并登录账号后在首页左侧输入试卷号 60 即可在线作答)，，作答电子化后可随时回放，查看每题答案与详细解析，搜藏保存任意题目；教师使用本平台可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力。本试卷的直接作答链接 https://tiku.one/test60.html
 作者: admin  发布日期: 2022-07-28 12:33    总分: 95分  得分: _____________

答题人: 匿名未登录  开始时间: 22年07月26日 13:45  切换到: 整卷模式

标记此题
1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the correct unit of work expresslpavcz gcp,.c-yt ,f 7). j*uued in SI units?

参考答案:    
标记此题
2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Can work be done on a system if thwy0erf0jmul90e fb g2ul4s37ere is no motion?

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If you push twice as hard against a (k 0loflj5y1r stationary brick wall, the amount of work youjo f (lkry501l do

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 50-N object was lifted 2.0 m vertically 5ktes3) to z;fand is being held there. How much work is being done in holding the boxsf ;)5tzoek t3 in this position?

参考答案:    
标记此题
5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If you walk 5.0 m horizontally forward at a constant velocity carrying5y8d.t+ g v :helxa8pv a 10-N object, the amoun+.:eylt dvhx58 va8pgt of work you do is

参考答案:    
标记此题
6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A container of water is lifted vertically 3.0 m then returned to its original pg.+0yq 8ly hdbosition. If the total weight is 30 N, how much y ylb0.hq d+g8work was done?

参考答案:    
标记此题
7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Does the centripetal force acting on an objybpi,xd-;kq 4vd t,1e ect do work on the object?

参考答案:    
标记此题
8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  You throw a ball straig 7x0gcwg j zwf1w.(an7ht up. Compare the sign of the work done by gravity while the ball goes gcjax10f77nwg.w (w zup with the sign of the work done by gravity while it goes down.

参考答案:    
标记此题
9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The area under the curve, on a Force versus positilyyru* .mpv;f58)* *kjniv d jon (F vs. x) graph, representsi8duv;l np )yy*k5 * j.v*rjmf

参考答案:    
标记此题
10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  On a plot of Force versus:vz*h h,8vc:tuug6kmu .zt i7 position (F vs. x), what represents the work done by the fmi .7ugvt6 c kh:uu :ztv*,hz8orce F?

参考答案:    
标记此题
11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The quantity $\frac{1}{2} \; mv^2$ is

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If the net work done on an object is positive, then the object's kino i62e7y4 z t.xzn(is*oa yx3retic energy

参考答案:    
标记此题
13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If the net work done on an object is negative, then the object's i9nn t-x))bhnkinetic energy

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If the net work done on an object is zero, then th9yr4ddza:4..os ivyke object's kinetic energy

参考答案:    
标记此题
15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A truck weighs twice as m8bu4g5;sra; xqfyex hac3.b5 uch as a car, and is moving at twice the speed of the car. Which statement is true about the truck's kinetic energy compared toa5 . exb ;rfgc5y; q8b34ushxa that of the car?

参考答案:    
标记此题
16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Car J moves twice as fast as car K, and car J has half the mass of carc2e4ksdnf2+.sr *bg (1d vtaa K. The kinetic energy of car J, ca(24bkg*as+c.etv2 1 sfdrn dompared to car K is

参考答案:    
标记此题
17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An object hits a wall and b gre818s03kg.,) emztm w+- ckgwrrq oounces back with half of its original speed. What is the ratio of the final kinetic energy to the initial kinetic energy )kg 88,+-1wqeoc r 0 se3tkgmr.mzrwg?

参考答案:    
标记此题
18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A brick is moving at a speed of 3 m/s and a pebble is moving at a speed of 5 w7hl d3(rlj5 nm/s. If both objects have the same kinetic energy, what is the ratio of the brick's mass to(h35l djrnwl7 the rock's mass?

参考答案:    
标记此题
19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 4.0-kg mass is moving with speed 2.0 m/s. jr59sbzkl5q,. s )wwiA 1.0-kg mass is moving with speed 4.0 m/s. Both objects encounter the same constant braking force, and are brought to rest. Which object travels the greater distance bef .skr5z,w 5sqbjl w9)iore stopping?

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  You slam on the brakes of your car in a panic u88hlv rpaib)3 p6,7ra,dkxe k7kr6d , and skid a certain distance on a straight, level road. If you had been traveling twice as fast, what distance would the car have skidded, under t6pial,brhe6a8k7rv k8r37 ,p x dd)k uhe same conditions?

参考答案:    
标记此题
21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A planet of constant mass orbits the Sun in an elliptical orbit. Neglecting apsx-mj6 a533op 9ja itny friction effects, what happens to the planet's kinetic enerpi a3x39 j6m-apto5jsgy?

参考答案:    
标记此题
22#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
State the work-energy pf:ai:see9 k0)j io2xpz8z 3 uarinciple.
参考答案:    

标记此题
23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The quantity mgy is

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
24#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The quantity $\frac{1}{2} \; kx^2$ is

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Is it possible for a system to have negative potentialqbjzn / cn,hxtsi o-4c+1u): o energy?

参考答案:    
标记此题
26#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An object is released from rest a height h above the ground. A second object w if46xhuqy nc u; c8+nbpu;:m7ith four times the mass of the first if released from the same height. b q 6cnc;y:xh u+;7u8fpmi4un The potential energy of the second object compared to the first is

参考答案:    
标记此题
27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 0.200-kg mass attached to the end of a spring causes zk8hw7hi *6/gh+d llk.rt+ yfit to stretch 5.0 cm. If another 0.200-kg mass is added to the spring, +*yw /8gtr6zhf h.l dkkl+h7 ithe potential energy of the spring will be

参考答案:    
标记此题
28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The total mechanical energy of a syst 3bcwdyh(--loem

参考答案:    
标记此题
29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An acorn falls from a tree. Compmnnf dr0 z;t u,9so6q:are its kinetic energy K, to its potential energy U 0f mdn qtz6nr:9ou,;s.

参考答案:    
标记此题
30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Describe the energy of a car driving up;2 b1w5ieu kd iq5r4/l vyxxz3(rx(rx a hill.

参考答案:    
标记此题
31#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A lightweight object and a very heavy object are s ihu7+*kgo, pf,x-m oaliding with equal speeds along a lev * gfhoki,xu7pom,+-ael frictionless surface. They both slide up the same frictionless hill. Which rises to a greater height?

参考答案:    
标记此题
32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider two masses w9h0x 4v+yxq/ g2ekg2w7y5 v mwgvfl:$m_{1}$ and $m_{2}$ at the top of two frictionless inclined planes. Both masses start from rest at the same height. However, the plane on which $m_{1}$ sits is at an angle of $30^{\circ}$ with the horizontal, while the plane on which $m_{2}$ sits is at $60^{\circ}$. If the masses are released, which is going faster at the bottom of its plane?

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
33#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
State the principle of conservation of mechanical energy for conc5 .euudwx8 x* l.hem: ah); 5ccf)zkiservative forcesluia.:hfw5m ;xu.hc ec ze5 * )k8c)dx.
参考答案:    

标记此题
34#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A ball falls from thz pc707z;w pa (f0fkkze top of a building, through the air (air friction is present)z ka zz;07cwpp0k(7f f, to the ground below. How does the kinetic energy (K) just before striking the ground compare to the potential energy (U) at the top of the building?

参考答案:    
标记此题
35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A ball drops some distance and gw 36:plx64bpz xro 7u ul(j-rl+cu7 fkains 30 J of kinetic energy. Do not ignore air resistance. How much gr r7jlu u(w3: 4b z6xlck7 6lfrpxpou-+avitational potential energy did the ball lose?

参考答案:    
标记此题
36#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A ball drops some diyoip)8:s .4sz4atb 1 e jnc(t6yw3xssstance and loses 30 J of gravitational potential energy. Do not ignore air resiso.jn1c(we)s atxb: s86 y44tiypz 3ss tance. How much kinetic energy did the ball gain?

参考答案:    
标记此题
37#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
State the law of conservation xk4 drte ,6grx -,c*ocof energy.
参考答案:    

标记此题
38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The quantity Fd/t is6t- s,lfh 3lpx)uvv 93vrah*n

参考答案:    
标记此题
39#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the correct unit of power expressed in SI me k 9a/vb:/r:z.41s xt3bddmeqv ,mgunits?

参考答案:    
标记此题
40#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Of the following, which is not a unitvm 8s+ p tij);alr( erfs2r0wwac-9/b of power?

参考答案:    
标记此题
41#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Compared to yesterday, uqz:76gj3w 8cjvt z j6 v(xhp4you did 3 times the work in one-third the time. To do so, your power output must have 7gx43 twjzu 8( cvjqv:6j6hzpbeen

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
42#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  To accelerate your car at a constant acceleration, the ca9oy w5qg40i eb:mib1s r's engine must

参考答案:    
标记此题
43#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An object is lifted vertically 2.0 m and helma2pxq7 xhr/r5xy7 4b 5ts so)d there. If the object weighs 90 N,x h247s5xsbp/ym)qt5r 7r o xa how much work was done in lifting it?

参考答案:    
标记此题
44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  You lift a 10-N physics book up in the air a distanco26nbbd g k9) 4 arjfag)sb2m0e of 1.0 m, at a constant velocity of 0.50 m/s. What is the wor2bj 2)0 m soa kgda6nrg)fbb94k done by the weight of the book?

参考答案:    
标记此题
45#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 500-kg elevator is pulled upward with a constant force of 5500 N for e 8 pcq ufmp;dhj3j5/+.jm m7ca distance of 50.0 m. What is the work done by thm j.uc+mm8j/p 7chd 3f5 p;qjee 5500 N force?

参考答案:    
标记此题
46#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 500-kg elevator is pulled upward with a constant force of 5500 N fo:k jrc7,x q6ucr a distance of 50.0 m. What is the work done by the weiqxr:j k 6,7uccght of the elevator?

参考答案:    
标记此题
47#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 500-kg elevator is pulled upward with a constant forceik6r xsc9z3vm -tp s*: of 5500 N for a distance of 50.0 m. What is the net work done on th6stp:c vir9 3m-* xzkse elevator?

参考答案:    
标记此题
48#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 30-N box is pulled 6.03(-o z3 sxg4qa-i tjm90qcatg m up along a $37^{\circ}$ inclined plane. What is the work done by the weight (gravitational force) of the box?

参考答案:    
标记此题
49#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 4.00-kg box of fruit slides 8.0 m down a 4y 6v*uyio3) 9sqbp8k0etpcdramp, inclined at $30^{\circ}$ from the horizontal. If the box slides at a constant velocity of 5.00 m/s, what is the work done by the weight of the box?

参考答案:    
标记此题
50#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Matthew pulls his little sister Sarn (4q jrqr4z5vc2fn e;au o tv7x+x/8rah in a sled on an icy surface (assume no fricvrnr2x eqvo54j rnx/q4;f z8u+7c(t a tion), with a force of 60.0 N at an angle of $37^{\circ}$ upward from the horizontal. If he pulls her a distance of 12.0 m, what is the work done by Matthew?

参考答案:    
标记此题
51#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A force moves an object in the direction of the force. The graph in Fig. gse1uv92y*seh x2 2ur6-1 shows the force versus the object's position. Find the work done when the object moves fromus r1eesh9g 2vx2yu2* 0 to 2.0 m.


本题所包含的其它图片:

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
52#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A force moves an object in the d)rsf7gfr23:tbw +ijr,*a bveirection of the force. The graph in Fig. 6-1 shows the force versus the object's position. Find the work done when the object movg+serb:t7*v)j,b rrw af2 f3ies from 2.0 to 4.0 m.


本题所包含的其它图片:

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
53#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A force moves an object in the direction of the force. 7)ah+5 u;w1japurzyf The graph in Fig. 6-1 shows the force versus the object's position. Find the work done when the object moves from faa 157w+uzy h);jupr4.0 to 6.0 m.


本题所包含的其它图片:

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
54#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A force moves an object in the direction of the force. The g1mm y c*n gb+/w9+y2ie r4zjjqraph in Fig. 6-1 shows the force versus the object's position.2jzwj m4qmn1crigye 9 +/by*+ Find the work done when the object moves from 0 to 6.0 m.


本题所包含的其它图片:

参考答案:    
标记此题
55#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A horizontal force of 200 N is applied to ) p +:lwuh8ygvmove a 55-kg cart (initially at rest) across a 1g)vh+l y8pw:u0 m level surface. What is the final kinetic energy of the cart?

参考答案:    
标记此题
56#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A horizontal force of 200 lvq6y91mohda u2v; z 1N is applied to move a 55-kg cart (initially at rest) across a 10 m level surface. What is the final speed of2qvvz1a 6oyhm 9;uld1 the cart?

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 10-kg mass is movi1n9g* lgaxuq4aci1 * cng with a speed of 5.0 m/s. How much work is required to stop the1nxiga19c *la*qg 4c u mass?

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
58#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If it takes 50 m to stop a 2 g1gj+n f)ys+i y7zyucar initially moving at 25 m/s, what distance is required tyzu+s71y gg )fi+jn2y o stop a car moving at 50 m/s under the same condition?

参考答案:    
标记此题
59#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A spring-driven dart gun propels a 10-g dart. It is cocked by exeri29zol :;og 0uepjfo5 ting a force of 20 N over a distance oo0ig5;z jo:9 o u2pflef 5.0 cm. With what speed will the dart leave the gun, assuming the spring has negligible mass?

参考答案:    
标记此题
60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 100-N force has a horizontal component of 80 N and a vert /velogu1ivny*xykz51 6bj: ux23c.iical component of 60 N. The force is applied to a box which rests on a level frictionless floor. The cart starts from rest, and moves 2.0 m horizontally along the flo*xc /o1:6iyuz xvelk. vj231u5n gbyi or. What is the cart's final kinetic energy?

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
61#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An arrow of mass 20 g is shot horizontally into a bale o:p6kf gyn v: d(/htgh:f hay, striking the hay with a velocity of 60 m/s. It penetrates a depth of 20 cm before stopping. What is thhh6 pv: dy n:(kf/:tgge average stopping force acting on the arrow?

参考答案:    
标记此题
62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 15.0-kg object is moved from a height of 7.00 m above a floor to a heighsb/ wc2 fs,ixq8qv. k9t of 13.0 m above the floor. Whatqkw s.v8bc fx9,2/isq is the change in gravitational potential energy?

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
63#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 400-N box is pushed up an inclined plane. The plane is 4.0 m long and risob+*6 ;2s fwguproyjb )pk 4;ses 2.0 m. If th y;gp )6bu*+fjos;2r4 po bkwse plane is frictionless, how much work was done by the push?

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
64#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 10-kg mass, hung onto aw:pyj-hn4xg: y +wj+ a spring, causes the spring to stretch 2.0 cm. What is the spring constjh:+w x +-gnwajyyp:4ant?

参考答案:    
标记此题
65#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A spring is characterized by a spring con)jt ou4ne; ,nlstant of 60 N/m. How much potential energy do4e;n )ltuj n,oes it store, when stretched by 1.0 cm?

参考答案:    
标记此题
66#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Calculate the work required to compress an initial+z(,1dncc5on k4cuod .8x pz sly uncompressed spring with a spring4zus .+o1cnd( 8c 5po,cz ndxk constant of 25 N/m by 10 cm.

参考答案:    
标记此题
67#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What work is required to stretch a spring of spring constanvgm y)p5r, i-4vqyo j2t 40 N/m from x = 0.20 m to 0.25 m? (Assume the unstretvyg4 )yqj 2r,m5oiv-pched position is at x = 0.)

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
68#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A spring with a spring constant of 15 N/m is initially compressed by z m g+pb7:abx; h*fin+3.0 cm. How much work is:hf;nga+i px+*b 7bz m required to compress the spring an additional 4.0 cm?

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
69#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 60-kg skier starts from rest from the top of a 50-m high slopeckm,+kb xe:ht pg69d7 . What is the speed of the slier9xg7hd ,kepm6bc+: tk on reaching the bottom of the slope? (Neglect friction.)

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
70#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A skier, of mass 40 kg, pushes 1 k8gfhck)cn4, 2lzluoff the top of a hill with an initial speed of 4.0 m/s. Neglecting friction, how fast will she be moving after dropping 10 m ck2g 1ul4f8kz) c ,nlhin elevation?

参考答案:    
标记此题
71#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An object slides down a frictionless inclined plc ,6 ui5oaxrt-ane. At the bottom, it has a speed of 9.80 m/s. What is the vertical height of the plan 6artcxi,5- oue?

参考答案:    
标记此题
72#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 1.0-kg ball falls to the floor. When it is 0.70 m ab,vixm wfnw)5 5u7r(mtove the floor, its potential energy exactly equals its kinetic energy. How fast is it movingi5v)(nr 7 tf mwmuw5,x?

参考答案:    
标记此题
73#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A toy rocket, weighing 10 N, blasts straight up from ground level with axb6gp78s ,kszf8n 0jh kinetic energy of 40 J. At the exact top of its trajectory, its total mechanical energy is 14 jssg8pb 0f8,xh7zn k60 J. To what vertical height does it rise?

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
74#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A projectile of mass m leaves the ground with a kax yk)bk m:9(1z q :9eqonb3dqinetic energy of 220 J. At the highest point in its trajectory, its kinetic energy is 120qb e3d(zok 9:kxn9b aq)1 q:ym J. To what vertical height, relative to its launch point, did it rise?

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
75#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A roller coaster starts from rest at a point 45 m abf g:gm-g ar:;vove the bottom of a dip (See Fig. 6-2). Neglect friction, what will be the speed of the roller coaster at the top of the next slope, which is 30 m abov; :mg:g vfarg-e the bottom of the dip?


本题所包含的其它图片:

参考答案:    
标记此题
76#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A roller coaster starts with a speed of 5.0 hrad gh/9.h 8dm/s at a point 45 m above the bottom of a dip (See Fig. 6-2). Negl 8 gh/.9ddhrahect friction, what will be the speed of the roller coaster at the top of the next slope, which is 30 m above the bottom of the dip?


本题所包含的其它图片:

参考答案:    
标记此题
77#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A roller coaster starts at a point 30 m above the bottom of a dip w;w 0( vev,2 huko+mfsc7tr 7xyith a speed of 25 oe7;(xhymcurw vv27k0,+ fst m/s (See Fig. 6-2). Neglect friction, what will be the speed of the roller coaster at the top of the next slope, which is 45 m above the bottom of the dip?


本题所包含的其它图片:

参考答案:    
标记此题
78#
 
  What is the minimum speed of the ball at the bottom of iy 8*nea o1i3qdts swing (point

参考答案:    
标记此题
79#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A:2.2 m/s

参考答案:    
标记此题
80#
 
  难度:2

参考答案:    
标记此题
81#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A pendulum of length 50 cm is pulled 30 cm away frook4,bzst t ua)5, tx(p7 vsj8gm the vertical axis and released fromaus(x,gs)5 btjp7ot,k8tzv4 rest. What will be its speed at the bottom of its swing?

参考答案:    
标记此题
82#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 1500-kg car moving at 25 e-. vg e-qcfc;m/s hits an initially uncompressed horizontal spring with gc- vqe.c;- fespring constant of $2.0 \times 10^6 \; N/m$. What is the maximum compression of the spring? (Neglect the mass of the spring.)

参考答案:    
标记此题
83#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A driver, traveling at 22 m/s, slows down her 2000 kg car tol67i3wnh: kb1 uzik7c stop for a red light. What work is done by the fri73bwi:h1n6k kuc7iz lction force against the wheels?

参考答案:    
标记此题
84#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The kinetic friction force betwee/a bfkcd.cbj4,-w f 8gn a 60.0-kg object and a horizontal surface is 50.0 N. If thbbgf4/- kcj,ca f dw8.e initial speed of the object is 25.0 m/s, what distance will it slide before coming to a stop?

参考答案:    
标记此题
85#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 12-kg object is moving on a rough, level surface. It has 24 J of jbv e qb5;15j eh)tx/mkinetic energy. The friction force on it is a bmj5hbe j;q) exvt51/ constant 0.50 N. How far will it slide?

参考答案:    
标记此题
86#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A force of 10 N is applied horizontally to a 2.0-kg mass on vbyeqvy62vy 8 q2u;-jl7nu y( a level surface. The coefficient of kinetic friction between the mass and the surface is 0.20. If jy6v7 2yl(n2 yvq yq8ub;uve- the mass is moved a distance of 10 m, what is the change in its kinetic energy?

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
87#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 60-kg skier starts from rest fro5zre6, xc3joa1ouyd1lq o /4 6oh8kcom the top of a 50-m high slope. If the work dy cu15 kooroq co14 /l,63jhdazxo6e8one by friction is $-6.0 \times 10^{3} \; J$, what is the speed of the skier on reaching the bottom of the slope?

参考答案:    
标记此题
88#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An 800-N box is pushed up an inclined plane. The plane is 4.0 m long and rise71 w:bdf/wf/wuf..ng nj qs9yu oc c6)s 2.0 m. It requires 3200 J of work to get the box to the top of the )97oqwy1s.w f6 wguf ucj bfn/c/ :n.dplane. What was the magnitude of the average friction force on the box?

参考答案:    
标记此题
89#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 2.0-kg mass is released from re6ef7,nhjda i/rvf37yf)nb; e v /,orr st at the top of a plane inclined at 20e above horizontal. The coefficient of kinetic friction between the mass and the plane is 0.20. What will be the speed of the mas)3nvji 7r;dne fo/ha er,r,6yb/ff7 vs after sliding 4.0 m along the plane?

参考答案:    
标记此题
90#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 30.0-N stone is dropped from a height of 10j;:o 9 hb2d :w,.pq1ytt*jklf pbp:gv.0 m, and strikes the ground with a velocity of 7.00 m/s. What average force of air friction acts on it.pgvj:j;ldoyp hb w:tf:b9 tk*2,1pq as it falls?

参考答案:    
标记此题
91#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  At what rate is a 60.0-kg boy using energy when he runs up a flight of stairk i2zt+6ey 1ufs 10.0-m high, u+fiz1e 2 ytk6in
8.00 s?

参考答案:    
标记此题
92#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 10-N force is needed to move an object wit .gd3 qlpok)nbs4w2u-c 7d7u qh a constant velocity of 5.0 m/s. What power must be delivered to the object by the force?u).q do 7u-23qgwnpsbdkl4 7 c

参考答案:    
本习题练习全部题目来源于题库网 (https://tiku.one)，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
标记此题
93#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How many joules of energy are used by a 1.0 hp z*gji.mfv8e e a rnfp87n4ak5 f419zf motor that runs for 1.0 hr? (1 hp zgj8k mzvefrn8. 4n1iefpff a45 a 97*= 746 W)

参考答案:    
标记此题
94#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A cyclist does work at the rate of 500 W while h35 sp)(l dcdv ne+f:criding. How much force does her 5cfv)p +(cl3dh e:s dnfoot push with when she is traveling at 8.0 m/s?

参考答案:    
标记此题
95#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 1500-kg car accelerates from 0 top ijxv825ua2)h v5n swqcgp)ky r8h.0 j59j ki 25 m/s in 7.0 s. What is the average power delivered by the engine? (1 hp yaw2p)0pi8nj v rgj)i v 98s hj5uq52x hkk5.c= 746 W)

参考答案:    
  • :
    •
    总分:95分 及格:57分 时间:不限时
    未答题: 已答题:0 答错题:
    当前第 题，此次习题练习共有 95 道题
    本系统支持习题练习，作业与考试三大模式，作业考试自动评分，成绩排序一键导出，可设定动态变量同一试卷千人千题
    如果您对本系统感兴趣，想加入我们或者想进行任何形式的合作，请加微信 skysky1258

    试卷内容到此结束!   © 2024 题库网 (https://tiku.one)版权所有

    浏览记录|使用帮助|手机版|切到手机版|题库网 (https://tiku.one)

    GMT+8, 2024-11-23 21:26 , Processed in 0.477896 second(s), 211 queries , Redis On.