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 eqkuwu6 -l3c; bort ,/expressed 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 systed dw7a :ljf0pdm8 n-1pk 706nxx9ht- vjiqao7m if there is no motion?

参考答案:    
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 stationary brick wwke4*q5jo c qjx ;r/u(all, the amount of work you r*jk ;/4u jqq oexc(w5do

参考答案:    
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 and i7.3mp,kgqi l ms being held there. How much work is being done in holding ti .k3p7qm, gmlhe box 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 forwar;p igxw*16wb87cbz-aoy n -vog6)n pkd at a constant velocity carrying a 10-N object, the amount ofp 68n;y-pgb1n6ao-oz vbiwcg *w 7)xk work you do 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
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 m,x./4 qg fn)opucyo-original position. If the total weight is 30 N)n- ,y.p/umxocg4o f q, how much work 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 forcft-f/3 5el0mu,g qvr we acting on an object 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 straight up. Compare the sign of the work done by gravivrldbvoseyt*or: (9-f7aij.u i 2o 6:ty while the ball goes up with the sign of the work done byt9*yvr-:ujdab6 r lf (io2 eioo:. 7sv 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 c49/- :gna01devqhi,lqw1 j giw nq6ia Force versus position (F vs. x) graph, representsehd-w :/1 gjqv,qc9g i0niw nlq 4ia61

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 position (F vs. x), what reprek fc e5-(ouyr5cwu l9-sents the work done by the force F-e cu ( -5r5kuwoycfl9?

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:    
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 posit ;,ozp1 df 73ckdjfl2cive, then the object's kinetic 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 i3bt11lhdhy .(hgv0ha s negative, then the object's kinetic energy

参考答案:    
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 z 181vl lqk9poi opgr 2thf967yero, then the 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 much 3h cgj.,:ys8)gzikjv*r lv/ q as a car, and is moving at twice the speed of the car. Which statement is true abou.:/ 8ci,z ry3) hkgvjlqg*vsjt the truck's kinetic energy compared to 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 thm01.e/tj k wkte mass of car K. The kinetic energy of car J, comptmw10 k k/jte.ared 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 an :g( n,mz:gtdcd bounces back with half of its original speed. What is thgtd :cz:(gm ,ne ratio of the final kinetic energy to the initial kinetic energy?

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 ;o);qn v .lu4pcabj.d tkn//nat a speed of 5 m/s. If both objects have the same kinetic energy, what is the ratio of tblpn. a ;uv /j)nkdoncq4/t.;he brick's mass to 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. A 1dlxv66.+bavbgh -an2c8n fx; .0-kg mass is moving with speed 4.0 m/s. Both objects encounter the same constant braking force, and are brought to rest. Wx6-bxnvg a+c8d hvlaf2 bn;6. hich object travels the greater distance before stopping?

参考答案:    
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 t(vavcli rjd48 +9ii, cp/bq)of your car in a panic, and skid a certain distance on a straight, level road. If you had been traveling twice as fasta(tcp ri9 lv),/4 jbcq8vid i+, what distance would the car have skidded, under the 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. i0-aw)l.zula;9kpcy -q y)j rNeglecting any friction effects, what happens to the planet'iuw9pqyja car;)y 0).kl--lzs kinetic energy?

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 principgqr5t ag+i sxq e6rz* sa18r6.le.
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:    
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:    
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 negaiq-aa-8q eyv; y 6u0smtive potential 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 releaseb4v 60z 7b wwi;axo9/f.) / djfgclbcsd from rest a height h above the ground. A second object with four times the mass of the first if released from the same height. Tia bx4wf)sb7lvo/jz 6 f 9 dc;b.gwc0/he 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 it to stretch 5.0 cm. If ;,jc)sre51v + fda a/tr 3tkaf:gjf l1another 0.200-kg mass is added to the spring, the 5tajfef3s 1rflr;avk),j dc/g t+a:1potential 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 sysi 6h/ov-8be rr8 l4yabtem

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
29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An acorn falls from a tree. Compare its kinetic energy K, to its potentj7 :2wc, lu tqnyl8p0:, fgseuial energyyqen,:cgtj:lp 207f,u 8wusl U.

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
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 a hil hhmgu d1j ,67bymgc.ph 2/y*pl.

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 sliding with equal spefk tb/ a5 a5e*t:r:pdx8as d)veds along a level f5p *8)b/:rfxakded aa:5t stvrictionless 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 mut1.y*52tln m-kjl g )gw eb8$m_{1}$ 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 cdu8*h5g v,lk konservative forcesu kdk,58*gh vl.
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 the to(/m1y;zw 8 iltq)bhuxp of a building, through the air (air friction is present), to the ground below. How does the kinetic energy (K) just before striking the grounw )tx/ lqyh;u18mb(izd 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 gains 30 J of kinetic energy0n76 3 sogd irj4md.us. Do not ignore air resistance. How much gravitational potential energy did th4 76 sidr.o3m gs0dujne 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 distance and loses ki1y9fhr 8,0ei(e aao 30 J of gravitational potential energy. Do not ignore air90 ,aykea 8e ofiih1(r resistance. 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 conservd8t: x l2sdp.0obxjn6/nv w1 lation of 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
38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The quantity Fd/t isjb ll gokj7l.e2//vi:

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 pow r:ddhc -is;ncfw+1z 93kvxjqy*3a ( ter expressed in SI units?

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 unit of powevfj 5+s n845fkjr m51y dzdx6ur?

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, you did 3 timou0h(mt:zb bekas6s3 (t fw2 ,es the work in one-third the time. To do so, k a(2w3,o:ttubzseb0mf s6h( your power output must have been

参考答案:    
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 car's engine m3,kl z p0mv-(lr6s ljlust

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 held ther r q67go*ho +jyc vgirk4a:z4; o 6(ew7q)cltne. If the object weighs 90 N, how much work was d6;qra4:q7* ocv)7y46h +j c (ril nt ggwokozeone 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 phys f6:27pwckvvwics book up in the air a distance of 1.0 m, at a constant velocity of 0.50 m/s. What is the work done p :k wvw672vcfby 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 pull qu0fi8opo:byq2) 3j.xh k4yeed upward with a constant force of 5500 N for a distanco:qbq. h e0xk8)oju p3y24if ye of 50.0 m. What is the work done by the 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 az)v8+mzo)nvj.i02mg 4 hfdq s constant force of 5500 N for a distance of 50.0 m. What is the work done by the weig4 ms)zv 2gf)jd8+ zhnvoqm.i0 ht 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 force of 5500 N 7 .)7hsxolop hfor a distance of 50.0 .)hp7sl7hoo xm. What is the net work done on the 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 6.0 sd o6j,b4hym 3m 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 ramp, inclined , ym)trb/d3(di)bh of 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 Sarah in a sled on an icy surface (assumx38dndf5+on je no friction), with a fonfx8+djn od35 rce 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 forcnkz g((6 ule*i q1l*dfe. The graph in Fig. 6-1 shows the force versus the objectu( * *zf(nkdqg61lie l's position. Find the work done when the object moves from 0 to 2.0 m.


本题所包含的其它图片:

参考答案:    
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 b j wgj1dd-4*ythe direction of the force. The graph in Fig. 6-1 shows the force versus the object's position. Find the work done when the o*wg1jdb-4jd ybject moves 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. The graph in Fig. 6b-p *ru5t caa3-1 show* trba5ap3u -cs the force versus the object's position. Find the work done when the object moves from 4.0 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 directio2,nsnqkb gvk5od 93cy 8.rm9o n of the force. The graph in Fig. 6-1 shows the force versus the object's position. Find the work done when the object mod,2okn8 .o9bc5r3nymv k 9sqgves 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 61 *t(s fbbeteps5wyw 5b5dh,applied to move a 55-kg cart (initially at rest) across a 1(fd*e tse5 w wb15s p5y,b6thb0 m level surface. What is the final kinetic energy of 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
56#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A horizontal force of 200 N is applied tor6z cln,es7 9x move a 55-kg cart (initially at rest) across a 1xlrzn7 96ecs ,0 m level surface. What is the final speed of the cart?

参考答案:    
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 moving with a 7ka4cm ,.sqydspeed of 5.0 m/s. How much work is required to stop tdc 7syqam ,k.4he mass?

参考答案:    
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 car initially moving at 25 m/s, whathaj l7y+qyy3bi*-li : distance is required to stop a car moving at 50 m/s under the same co 3yh aqliily-:7+yb*j ndition?

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 exerting a force wvnsa w o/hre7.d(,b/of 20 N over a distance of 5.oshv, b wn/r.(7ae/dw0 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 vertical component of 6k 0pkj1xzxf8 p./vh,g0 N. The force is applied to a box which.kzx kp p/xv 1fh0,8gj rests on a level frictionless floor. The cart starts from rest, and moves 2.0 m horizontally along the floor. What is the cart's final kinetic energy?

参考答案:    
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 of hay, striking theefhve8sj 4:ll9z17jq) 3 r ncs hay with a velocity of 60 m/s. It penetrates a depth of 20 cm before sen9f v13scsz:jr47 lq) lej h8topping. What is the 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 cq:cg 7h3dh :+0judlxuk qm,2ydu 3:sa height of 13.0 m above the floor. What is the change in gram dqhcg:3 +7lc0 udjuqxsh,y2ud::3 kvitational potential energy?

参考答案:    
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+ p9x8ji4ivu5wi1 z4qro+g mtty.k y9 up an inclined plane. The plane is 4.0 m long and rises 2.0 m. If the plane is frictionless, how much work was r9918+ xkviyyzuqop+ 54g .4wiitmt jdone by the push?

参考答案:    
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 ont3* kurz9itmva /9 9pyyo a spring, causes the spring to stretch 2.0 cm. What is the spring9av 9k 9 r*uz3/iymtpy constant?

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 cons wzfut,c173ct tant of 60 N/m. How much potential energy does it store, when stretchedzu7twt,fc 31 c 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 initially uncompressed spri, rf1s):h fvzxng with a spring constant of 25 N/m by 10 cm. fxv:f h1,rs)z

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 su5i::n 2lek 1al2mli xpring constant 40 N/m from x = 0.20 m to 0.25 mx52ai2uel:k lmli:1 n? (Assume the unstretched position is at x = 0.)

参考答案:    
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 initiavk9 ye-i 62k ,d4gthojjl: b2tlly compressed by 3.0 cm. How much work is required to compr2dgjv264:h9 tb teo-lkk,yi jess the spring an additional 4.0 cm?

参考答案:    
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 hig8., qfge f.jsdh slope. What is the speed of the slier on reaching the bottom of the slope? (Neglect friction.gsjef .,qf8d. )

参考答案:    
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 off the top of a hill withtmidzf//.f2z e 1*rb x an initial speed of 4.0 m/s. i *bfrfm z1.2/etx/z d Neglecting friction, how fast will she be moving after dropping 10 m in 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 ijz9lee/3,lwf(wc3 ;j o:ggj t j++na o,mq5xanclined plane. At the bottom, it has a speed of 9.80 m/s. What is the vertical height of thelza+cjee 3+ g/xo wt,nfjq,gwl( j53oj:a9;m 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
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 cci cfzvkidbz (uskkl 9z(-/;: sc(69is 0.70 m above the floor, its potential energy eb/ l:cf 6i;99 k((-sv kdsuzkzzc(cicxactly equals its kinetic energy. How fast is it moving?

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 s jdp f.00q:r l.v+0fvxhre:ox traight up from ground level with a kinetic energy of 40 J. At the exact top of00 f:h+vpe d xvjxfl.rro:q.0 its trajectory, its total mechanical energy is 140 J. To what vertical height does it rise?

参考答案:    
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 groununm9c4bk.) c ld with a kinetic energy of 220 J. At the highest point in its trajectory, i.bl c)um9n4c kts kinetic energy is 120 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 cnf;68l 5r;.f ae hkyva point 45 m above 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 above the botto65kn;vy a .hceflf;r8 m 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 5qz4nm uui1es, w ,+bt,.0 m/s at a point 45 m above 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 a,i4s,+qnu zb,1mw eutbove the bottom of the dip?


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
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 x6/p)i tlyq a78brg /xdip with a speed of 25 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/ qiypbx6x7)/r 8gal t 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 nra )0/a6ox cqe;2 yid10ptnxof its 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:    
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
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 u;vuf+/;p8a e goqd1 bdql 1l9cm away from the vertical axis and released from rest. What will be its speed at the bottom of its sw1l1qud8ve pq/;fa ;blgou9+d ing?

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 m/s hits an initially uncompressed horizontal spri+cmj2q66ktt jng with spring constant of m2q6tjc+6k jt $2.0 \times 10^6 \; N/m$. 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 to stlcssu :gy6/2 kr )5mrxx2ela *op for a red light. What work is done by the friction force against the wheer eg2as:lxcuyrl2/sx6k m)*5ls?

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
84#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The kinetic friction force between a 60.03sv gw*b .0igl-kg object and a horizontal surface is 50.0 N. If the initial speed of the object is 25.0 m/s, what distance will it slide before c igsl0v3.g *bwoming 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 kinetic enerrc-cgt a.,w4dgy. The friction force on it is a constant 0.50 N. How far willwra cd4,gc-t. 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 a level surfadl1ou 0 (e mffeh*z::8b2 edobce. The coefficient of kinetic friction between the mass and the surface is 0.20. If the masfdz o8b0ulbmdo* f1:e(h e: 2es 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 pb 5r9 kmjp0o6from rest from the top of a 50-m high slope. If the work done b9m kb0o p5r6pjy 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. s+gw ) 7(chdz m7cfzy3 The plane is 4.0 m long and rises 2.0 m. It requires 3200 J of work to get the box to the top of the plane. What was the magnitude of the average friction force on t)f hz(37sgzmdcy 7wc+he 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 rest at the top of a plane in7jw*t*gpscefrne ky28o 5 msh0a( 4k 5clined 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 mass after sliding 4. yp*t gfm20 5(*ceran7ke4h85oss kw j0 m along the 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
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 heiga3vm; gvjs qtlz/ 7u52ht of 10.0 m, and strikes the ground with a velocity of 7.00 m/s. What average force of air friction acts on it as it fam s5j7gz q2vlv3 uat/;lls?

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 em i8tvb7 m:rw0nergy when he runs up a flight of stairs 10.0-m hitmi:v70r wbm8 gh, in
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 with a constant velk2b41ie,u omi4/mq yf,v n1jf9s x1qxocity of 5.0 m/s. What power 4if isn1xxq1qj 2 uvy,9 1memo 4fb,/kmust be delivered to the object by the force?

参考答案:    
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 xyo60 :mqwrse ;1 x1wqare used by a 1.0 hp motor that runs for 1.0 hr? (1 hp = 746 yqq6e s1; ox1:mwxrw0 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 riding. How much force does he u5 /ev/io/d4xzf7;zyb duw3or foot push with when ;uf oo//45evzddyx7iwb / uz 3she 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 *zagak25p9 m- h w;lketo 25 m/s in 7.0 s. What is the average power delivered by the engine? (1 hakz2 59g-lhe*k;wm p ap = 746 W)

参考答案:    
  • 答题人:
    •
    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, 2024-10-5 04:28 , Processed in 0.564142 second(s), 211 queries , Redis On.