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:Grade 9 Test on Mechanics 20241217



 作者: evachen发布日期: 2023-12-22 12:56   总分: 44分  得分: _____________

答题人: 匿名未登录  开始时间: 23年12月17日 19:00 截止时间: 当天 20:00  切换到: 整卷模式

标记此题
1#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4094  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  A new car manufacturer advertises that their car can go "from zerocrs ,. e3mc:.mnn jz)2b4eaji to sixty in 8 sj n m. bm:3ce4ic.zearns)2, j". This is a description of

参考答案:    

标记此题
2#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4095  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  Suppose that a car t b7 yeb,n6wcfa5 t.9 vp1vie.traveling to the East (+x direction) begins to slow down as it approaches a traf9b6..c , iyfnvwvbea7e 15ttpfic light. Make a statement concerning its acceleration.

参考答案:    

标记此题
3#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4096  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  If the velocity of an object is zero, does p rri,lqri -jj6 ,(hm,it mean that the acceleration is zero?- ip,jlr ,h ,r(6irjqm Support your answer with an example.

参考答案:    

标记此题
4#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4097  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  Objects A and B both start at rest. They both accelerat,5x l1w *qa0a+ioz xoge at the same rate. However, oo+ l qa5z0*ixwg,a1x object A accelerates for twice the time as object B. What is the final speed of object A compared to that of object B?

参考答案:    

标记此题
5#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4098  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  Suppose a ball is thrown stra 34jdjd5 zg2uu9i k 5aqt,ach4)v0ldjight up. Make a statement about the velocity and the acceleration when the ball reaches the h u 3j 5,jgq4j) 5h0uakvdct42aizdl9 dighest point.

参考答案:    

标记此题
6#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4099  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  Ball A is dropped from thyur 4x c19fy4he top of a building. One second later, ball B is dropped from the same buildir9x4fuhc1 y 4yng. As time progresses, the difference in their speeds

参考答案:    

标记此题
7#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4100  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  A cart starts from rest a6i;ky fkg d0e2nd accelerates at $4.0 \; m/s^2$ for 5.0 s, then maintain that velocity for 10 s, and then decelerates at the rate of $2.0 \; m/s^2$ for 4.0 s. What is the final speed of the car?

参考答案:    

标记此题
8#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4101  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  A cart with an initial velocity of 5.0 m/s experiences a constant accelfz8ed e3- ey(93qcau beration of e3b9qye(eu 3dfz ca-8$2.0 \; m/s^2$. What is the cart's displacement during the first 6.0 s of its motion?

参考答案:    

标记此题
9#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4102  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  An object is thrown upward with a speed ofpg- hyo+gvq5+o0et1nys- c q4 15 m/s on the surface of planet X where the acceoqgovy the015+ 4-+ pc-qsgy nleration due to gravity is $2.5 \; m/s^2$. How long does it take for the object to return to where it is thrown?

参考答案:    

标记此题
10#
 
填空题 ( 3.0 分) 切至整卷模式 eid: 4103  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  A ball is thrown straight up with a speed of 30 m/s. (only fill in numerical w1/ zbd/ /05eiizr olgvalurlzze dbg /10iio/5w/e in the blanks)
(a.) How long does it take the ball to reach the maximum height?    $s$
(b.) What is the maximum height reached by the ball?    $m$
(c.) What is its speed after 4.2 s?    $m/s$

参考答案:    

标记此题
11#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4104  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  In Fig. 2-1, what is the velocity at t = 5.5 s?h-f qv cu,o9hnhqu*1 )


本题所包含的其它图片:

参考答案:    

标记此题
12#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4105  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  In Fig. 2-2, what isbavrco.r7q ;g5t+e1g the acceleration at 1.0 s?


本题所包含的其它图片:

参考答案:    

标记此题
13#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4106  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  When you sit on a chair, the resultant force ocn50xi *, ux (6mvcgmdn you is

参考答案:    

标记此题
14#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4107  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  In the absence of an exter ,fx )+da nfn00 7t*vl7 1(i,wwfopb0 qjmvtdunal force, a moving object will

参考答案:    

标记此题
15#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4108  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  When the rocket engines on the starship NO-PAIN-NO-GAIN are suddenly gt ghi :12bqpy-rkkh +hpa:*2turned off, while travelingk-+p1:t2k habhy:*p 2 righq g in empty space, the starship will

参考答案:    

标记此题
16#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4109  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  A net force F acts on a mass m and produces an acceleration a. What uhn / x5bttb7ao2u9p(3 lht6vacceleration re9u3x7/ (5talbbo 6ntuhp2 t vhsults if a net force 2F acts on mass 4m?

参考答案:    

标记此题
17#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4110  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  A 20-ton truck collides with a 1500-lb car and causes a lot of damage to theniv:/ggpc--hs8z1p a v b n;8i car. Since a lot of damage is done on t ;-8v a gb1iip-gvp8/n:s znhche car

参考答案:    

标记此题
18#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4111  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  An object of mass m sits on a flat table. The Earth pulls on thaze y r,p.-wi4 3p9akyis object with forcepwr i4 9-ayypk, ez.a3 mg, which we will call the action force. What is the reaction force?

参考答案:    

标记此题
19#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4112  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  A brick and a feather fall to the earth at their respective terminal velelermh./ab 5ucb w1 vj-w 9:)qjg 5-hw6h(ahcocities. Which object experiences the greater force of air 5m: 9q1cwb gv -h -a jjlhc)hbua65he.wr/w(e friction?

参考答案:    

标记此题
20#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4113  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  An object of mass m is hanging by a stri4ieem m-x*bunx12l3 7yete .b ng from the ceiling of an elevator. The elevator is mov m31ye47 xmelu *itexeb2b. -ning upward, but slowing down. What is the tension in the string?

参考答案:    

标记此题
21#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4114  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  A packing crate slides dow z5/fh6xlyn 1in an inclined ramp at constant velocity. Thus we can deduce x/lyzi5 fh16 nthat

参考答案:    

标记此题
22#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4115  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  A person of weight 480 N stands on a scaleh)qlh l9 trr-7/ epl6z in an elevator. What will the scale be reading when the elevator is 7ll9r)l6t/ zpe qhhr-accelerating downward at $4.00 \; m/s^2$?

参考答案:    

标记此题
23#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4116  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  In the Atwood machine shown in Fig. 4-1, if M = 0.60 kg and m4rxga/ u7,gt r = 0.40 kg, what is the magnitude of the acceleration of the system? (Ignore friction and the mass of the pull/4,g7t uarr gxey.)


本题所包含的其它图片:

参考答案:    

标记此题
24#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4117  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  A student pulls a box of books on a smooth horizontal floor with a fsatdshckha ab7/ di(2n 0m31* orce of 100 N in c n* a1h23aihs/0 dm7tskad(b a direction of $37^{\circ}$ above the horizontal. If the mass of the box and the books is 40.0 kg, what is the acceleration of the box?

参考答案:    

标记此题
25#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4118  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  A traffic light of weight 100 N is supported by two ropes as n5x+xfl yam ;7aau, 8hshown in Fig. 4-2. What are the hn5m +,aa7fl8 yu;x xatensions in the ropes?


本题所包含的其它图片:

参考答案:    

标记此题
26#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4119  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  Two boxes of masses m and 2m are in contact with each other on a frictionless s9af/bns. mr :iurface. (See Fig. 4-3.) What is the acc r an9b:sm/.ifeleration of the more massive box?


本题所包含的其它图片:

参考答案:    

标记此题
27#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4120  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  A horizontal force of 5.0 N accelerates a 4.0-kg m udxdc4p4uc/ -jed-ge v*- v1bc /6brxass, from rest, at a rate of $0.50 \; m/s^2$ in the positive direction. What friction force acts on the mass?

参考答案:    

标记此题
28#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4121  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  An object is on a frictionless inclined lj e ))hpb) h8c7a9yvmplane. The plane is inclined at an angle b 9hc)h8m)jyp eav)l7of $30^{\circ}$ with the horizontal. What is the object's acceleration?

参考答案:    

标记此题
29#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4123  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  If you push twice as hard against a stationary brick mxm 1pj u:i;3 q5b(m)zl. qbcuwall, the amount of work yo.i1mj3 l5:pzxqubc) ;m qm (ubu do

参考答案:    

标记此题
30#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4124  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  If you walk 5.0 m horizontally forward at a constant velocity carryinxealxx-p+f wo d65nl7 z q;h 1al+a5-ng a 10-N object, the+l;zq lo -75xhnp +ax5ae-fxa16dlnw amount of work you do is

参考答案:    

标记此题
31#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4125  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  You throw a ball straig;a9q-e 2 p l1lso9-lwdbbhcm4ht up. Compare the sign of the work done by gravity while the ball goes up with the sign of the work don-91 l- b4; alplcqomdbe92shwe by gravity while it goes down.

参考答案:    

标记此题
32#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4126  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  A truck weighs twice as much as a car, and is moving at twice the speed omooeo6xhqtju2m20..a*v y5 l f the car. Which statement is true about the truck's kinetic energy compa 6e ho.2ooxqjm0tuyv 52a* lm.red to that of the car?

参考答案:    

标记此题
33#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4127  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  A 4.0-kg mass is moving with speed 2.0 m/s. A 1.0-kg mass is movingg,fza,d o27jdqfku) .x c(r -s with speed 4.a o72q,rk x -s djfcd),.z(fgu0 m/s. Both objects encounter the same constant braking force, and are brought to rest. Which object travels the greater distance before stopping?

参考答案:    

标记此题
34#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4128  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  Is it possible for a system9ftvc0ea1:7 ;mil vrz to have negative potential energy?

参考答案:    

标记此题
35#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4129  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  An acorn falls from a tree. Comparecvbho (15l 4h-fqwtl: its kinetic energy K, to its potential energy 1o lvq 5lhbtcw(h :4-fU.

参考答案:    

标记此题
36#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4130  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  Compared to yesterday, you did 3 times the work in one-third the s8o-wk pfx-o;time. To do so, your power output must h8 p-xof; kow-save been

参考答案:    

标记此题
37#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4131  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  If it takes 50 m to stop a car initially moving at 25 m/s, what dig(u 8m7fum4ctl) q 0iestance is required to stop a car moving at 50 ml8egu c m0uq)ft7( 4mi/s under the same condition?

参考答案:    

标记此题
38#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4132  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  A skier, of mass 40 kg, pushes off the top of a hill with an initial speezl6 +f ev-vsr9d of 4.0 m/s. Neglecting friction, how fast will she be mrvs-l e 9zf+6voving after dropping 10 m in elevation?

参考答案:    

标记此题
39#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4133  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  A toy rocket, weighing 10 N, blasts strc -d)1)0w. (- s*y1bu qrasumxoag ynraight up from ground level with a kinetic energy of 40 J. At the exact top-s10r)r)ms c yu*(qxa1gyuo.-anb wd of its trajectory, its total mechanical energy is 140 J. To what vertical height does it rise?

参考答案:    

标记此题
40#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4134  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  A roller coaster starts from rest at a point 45 m abo ju- )5uykf4uyve the bottom of a dip (See Fig. 6-2). Neglect friction, w)y yju4fu5u -khat 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
41#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4135  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  A roller coaster starts at a point 30 m above the bottom of a dip with a sa . piqu1lt/i.eeu3m*peed of 25 m/s (See Fig. 6-2). Neglect friction, what will be the speed of the*3m1. utp e uliie.a/q 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
42#
 
单选题 ( 1.0 分) 切至整卷模式 eid: 4136  对错数 0:0  难度: *****  
试卷已过期,处于只读浏览模式,无法保存作答
  A 10-N force is needed to move an object with a constan-0g*+apffq yu;avyh/ t velocity of 5.0 m/s. What power must be delivered to f- g/qvu ;ah*p+0 yfaythe object by the force?

参考答案:    

  • :
  • 总分:44分 及格:26.4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 42 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

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

    GMT+8, 2024-12-4 01:09 , Processed in 0.370049 second(s), 105 queries , Redis On.