无忧得胜-网上国际课程 (5edu.win)

 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: 游客未登录  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 d 3a5m1wav:dz51 gog g9irpx0 can go "from zero to sixty in 8 s". Thigg1w0 d ma:xig 5z1op359ravd s 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 traveling to the East (+x direction) begi)bm.vqtpv7 rx50p fr1x00 yp fns to slow down as it approaches a traffic light. Make a statement concerning its accelera)1vr xr 50yvfb 0pfxmp7q0p.ttion.

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 it mean that the accelerati+uplva )f7j 5f,b2elz on is zero? Support your answer wit,e7)5bl a+ufjfl2zp vh 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 accelerate at the same,firymm4g,d,.36rn bb vei7x rate. However, object A accelerates for twice the time as object ,.fg6y 4m7x,eb nri3 , dmrvibB. 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 straight up. Make a statement about the /bb ,ws/xbp 0zoq( ,jevelocity and the acceleratiw bbs/0/ o jbpqzex,,(on when the ball reaches the highest 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 the top of a building. One second later, baa+tth m51r zb y1+hua+p tdn(4ll B is dropped from the same buildin14 httd1+a(n5umzb+ aph+y rt g. 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 and . sb) ug81z/jerc3zlm 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 expeh y czi n(hjc:p20n ,9w7uck2jriences a constant acceleration of(2uz :chc07n c,yhk n29w pjji $2.0 \; m/s^2$. 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 of 15 m/s on the surface of m 99k.tlc. lv 8qefvvp75ri*f planet X where the ac m.vcv8.fllrp q 9 itf7k*9ev5celeration 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 strade:x rv4 u2jlgk ;af55ight up with a speed of 30 m/s. (only fill in numerical value in the blanks4e:fg5xdauvrl 5; 2jk)
(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 = 5.5i:):prhe7 y wv s?


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 is the accel2ci6w,3 5aq3sfhgft c eration 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, taqsa/,hk7d sz ,+1 ghohe resultant force on 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 externa.jfn;r1 wt6. hn5bh3,x olrunl 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 3:ya,lu z9xmc dfa2f1are suddenly turned off, while traveling in empty space, the staf m fal9,zx2udc: ya13rship 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. +ekp97k kr3+.iumge ,kls5ck What acceleration reskk+,m 7k9ep5c3 .uigs +rke lkults 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 car7i-r))-zfavjs za aw: and causes a lot of damage to the car. Since a ls-a 7j-awizv)) ra z:fot of damage is done on the 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 this object ybiivn-6 hhri6oy; a 4-x(qx3with force mg, which we b46 3-i6yhn v(ia;-rqyxxiho 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 a k**gpo1clst3*t 2 altheir respective terminal velocities. Which object expe 2clk sp*atat1 l**go3riences the greater force of air 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 string from the ;4 7k 1wgs fvyq/su-pgcqu fa og)73-cceiling of an elevator. The elevator is moviwc; )kgu fq17f-q u/cps4y7vg3-go a sng 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-iio k;kog2,lwml9 y+q)+a wjn an inclined ramp at constant velocity. Thus we can deduce thal 9 kkagmo)i+qyi w+ ;-2owlj,t

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 scale in an elee ;el1u7b1ev uy*x(x e s2e2vqvator. What will the scale be reading when the elevator is accelerating downwaruexq2 eu7vl1b1* evxee2; ys(d 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 m = 0.40 kg, whly. umj..b9 enu49d.wahjbb6. x,dt n4 mh,huat is the magnitude of the acceleratio.n hl bb.ju dbxwm.94eu djmt,y,9..han uh64n of the system? (Ignore friction and the mass of the pulley.)


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 force of 1sl6 u+(y;i : qk3 mzy6wvnd:gp00 N in a direct:z36:di ;l ps6nyk myw+ug v(qion 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 9 jc ss7.-6mofhen8qh N is supported by two ropes as shown in Fig. 4-2. What are the tensionhjcq69e .- mo hs8sf7ns 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 andb / 0sjvd )k*al7u*o;pd ohk+s 2m are in contact with each other on a frictionless surface. (See Fig. 4-3.) What is the acceleration of the more h j/kd*os7apu ) ldo+vs0k* b;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 accele2yk3f+ j6mi idrates a 4.0-kg mass, 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 inclinedpq d72snntl v; iyyy;6 evd,9:kup8/h plane. The plane is inclined at an angle98yndivu ypdp2nt h;7 eyl kqs/;:,v6 of $30^{\circ}$ 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 wau,n)jtz+jd/ wq 91h+vrt mf9 fll, the amount of work yo9juvz ,/9+fnd jq)mrtt1fwh+u 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 hormlgbt k-ybo0:.pk g3sf(7 d7aizontally forward at a constant velocity carrying a 10-N object, the amount of work yob.d-7kg(b lo3kytmg7 s: 0apfu 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 straight up. Compar)x2,audb dh/ n k8boj-e the sign of the work done by gravity while the ball goes up with the sign of the work done by gravity while it goen) ,ku -xoa8bdb2hjd/s 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 thpp*r*ne yu 0t (;ehyq(e speed of the car. Whic*p h*ten;p(q (eryy0 uh statement is true about the truck's kinetic energy compared 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 moving with speey2pi zay)i;)dr d0ao3v-c jm4d 4.0 m/s. Both objects encounter the same constant braking force, and are brought to rest. Which object traveldaj)y4ovi)adi 3-mp 0 ; yrzc2s 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 system to have )pej4fh6za4wx34sciw8 u x7l 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. Compare its kinetic energy K, to its po3- fxwsi 5ha7ztential enerhswai5 7fx3- zgy U.

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, yr2cevh6o9fl c3vle0-rx .ik . ou did 3 times the work in one-third the time. To do so, your powerhx2 f e.ci -9lrlvk0c36e ro.v output must have 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 gq 8ojl79b.g)8 gy gu8ln(alf25 m/s, what distance is required to stop a car moving at 50 m/s undej78) .aull( b qlgo 9ngyf8g8gr 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 hi;n1jkvbx sa*8ll with an initial speed of 4.0 m/s. Neglecting friction, how fast will sn* a;b1 j8svkxhe be moving 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 wr,x 0enjaw .-z q mx9+ l,j0bib(q/phN, blasts straight up from ground level with a kinetic energy of 40 J. At the exaw0q wib/,+.9 0qlxzpj b mhrj,e(n-axct top 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 above the bottom of a dip (Seyzh+ n6k-rr9v e Fig. 6-2). Neglect friction, what will be the speed of the roller coaster at the top of the next slope, whi9y-kh rzn+vr6ch 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 .e xxr/ zo7u0- todr3 tu;6ztfm above the bottom of a dip 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,/-6te.;zfd urz0 x3t7trooux 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 withwf brrqxp;b77.b r 99x n8d.ib a constant velocity of 5.0 m/s. What power must be delivered to the ofn 7.7 x wxbq;r.p98bbbrr id9bject 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
本平台(https://mail.5edu.win/)支持练习,作业与考试(自动评分)三种模式,群组成绩统计排序导出,题目动态变量实现同卷千人千题
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|手机版试卷|使用帮助|手机版|无忧得胜-网上国际课程 (https://5edu.win)

GMT+8, 2026-3-27 13:12 , Processed in 0.411821 second(s), 114 queries , Redis On.