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 theirn5yc -fu/)--i,e fpmju+ abcw car can go "from zero to sixty in 8 s". This is a desa/bmcuiy)c +w-u,5f-n - pejfcription 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 Eq3-o f9aijo70t:yn zxast (+x direction) begins to slow down as it approaches a traffic light. Make a statement concerning its acceli:fy t9 zj7oq- n3xo0aeration.

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 t5- ru tcq/,grxeud p;t6+w s;che acceleration is zero? Support your ;6 5gdcxuq/teupt ;+rcw,s-r 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 accelerate at the same ra.k :m. e)doyuwte. However, object A accelerates for twice the time as object B. What is th.ue:.dky) wome 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. Mafl:) sw6 ycmt7ke a statement about the velocity and the acceleration when the ball reaches th tmcyf:w 6ls)7e 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, ball B ij,+.-i3 z7ja e6nogkg ge5eo jn,i8gis dropped from the same building. Aseje76goa5g8 +o i,-gj,ze .igi jn3kn 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 wrdzr;;a :-wfaccelerates 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 slr/ 2qwng1g)a constant acceleration on2l 1w/rggq )sf $2.0 \; m/s^2$. 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 zi;drx;qok(3k 1g3p)v+ +wsmw4 gz uf surface of planet X where the acceleration due to gravity i+w+spkgzvomf4q z)r (3idw 13;;uxkgs $2.5 \; m/s^2$. 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 num), +ouk*xpic ;jafl0rerical value in the bla lk iof;ca*)xur0+,pjnks)
(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 velovlw7,o4lm sa:na 1w;ocity at t = 5.5 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 acceleration at 1.0 s?d9hxkkp ps;3 a 1zl3zbro:u 04


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 on vi.zv6x:c1f0hdnf w +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 externv vlk; st*+ajmqcx3a/1 v 2z7pal 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-GAINd97jwvcj( 5l-rp xr*c are suddenly turned off, while traveling in err9c5cw *(pl7d-v xjjmpty 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 ah35px( hrrz we6 hx-o1 mass m and produces an acceleration a. What acceleration results if a 3x xher5wp (ohz-6rh1net 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 l )1y zx;g)wcathe car. Since a lot of damage is done olg)c zay ;x1w)n 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 ob5 dsn6v66 ofqwject with forcesw6v6oq56 d nf 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 terminal6d .ev-qwy*qggc 0 ns9 velocities. Which object experiences the greater force of airy*g9wq 0d sqv-ce6.gn 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 ceiling of an elevator. Tnlj2u0d yez v :s:v,ki)j1co9he elevator is moving upward, but slowing down. What is the tension in the string?z ),yuvve0lo1:: 9kdjnc2j s i

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 down an inclined ramp at cty.lxs2/s tu42 ct;0 kk *pmkwonstant velocity. Thus we can deduce thamt0 kss/.w 2tkpy 2;4utk xlc*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 emc nw3yej3k g*/-ml4q ft w0v8levator. What will the scale be reading when the elevator is accelerating dowe3mq*l/t wkvj- 3cgfm80 ywn4nward 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, jzzg(uje:+h * if M = 0.60 kg and m = 0.40 kg, what is the magnitude of the acceleration of the sz+h(gjjz eu*: ystem? (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 m0jj6 3)4 fi.rmsy ycbfloor with a force of 100 N in a direction ocb. 3mj yj6rm4 yif)s0f $37^{\circ}$ 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 ro-cw56ag 7gbeuh+ hr-upes as shown in Fig. 4-2. What are the tensions in the ropegr- 5ae-uhch wg bu67+s?


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 0zvqv ,;2v k:da9b of(eown1 o go3oy3 f1xt6fin contact with each other on a frictionless surface. (See Fig. 4-3.) What is the acceleration of tofzt2 v fkoq3fvb:ov;(n ado1 e,1x396gwo y 0he 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 acceleratesv.qa a 4j,*mnd 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 inclq9 wandc+gh 45 l j7o:mfutr 7t1vki8*ined plane. The plane is inclined at an angle of9cu5 w agoqh 4 d :*f78nmi71tljtk+rv $30^{\circ}$ 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 har-beu6z7 4 kdv:pk64r7brxbzed against a stationary brick wall, the amount of work you dxbrzrkvu:ee 6447-bpzk d7 6bo

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 vel ra)lmu3g6n7 wocity carrying a 10-N object, the amg3wanu7m l6)rount 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 straight up. Compare the +lq3l(+5k jyepzvt-c sign of the work done by gravity while the ball goes up with the sign of the work done by jc-kylqzlev( +pt+3 5gravity 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 s5) jnj)mk7 hras a car, and is moving at twice the speed of the car. Which statement is true about th7s n)rj5kj m)he 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 spe 0s zc(9 ydjj7*cwosd9ed 2.0 m/s. A 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 travelsswcjc7od d*(9ysz 0j9 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 hav1zg / sey*,2m9hfyf gwe 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 ki ;:.ihbvtiv+no0*znroeqpgq 8fj--be9 o 3 ;ynetic energy K, to its potential energ* h-e-9ob gnvqo;:qo.n3i+irpjybfze0; vt 8 y 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, you did 3 times the work in one-third the time. To do s:79rg vc.uhzf o, yoc gv7u 9r.:zhfur power 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 25 m/s, what di5xc q6 z0y1e6:o1 keofmi1hpwstance is required to stop a car moving at 50 m/s under the sam11yk iz5xephe 6 m: 6o1qow0fce 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 tohub l6u p a2hx,wzr5 j:auy;a;6q..dbp of a hill with an initial speed of 4.0 m/s. Neglecting friction, how fast will she be moving after dropping 10 m in elevabbradp: yzxuq,u..u6a ; wja h26 h;5ltion?

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 straight up from gr;f.n z2zcg)w2q npsw4lc3 9 paound level with a kinetic energy 9z ng flpaswq4p.c2;z)c3n2w of 40 J. At the exact 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 lo e*2l8.6rt*usgpmm of a dip (See Fig. 6-2). Neglect friction, what will be the speed of the roller coaster at the top of the nlt pms.lr um **go862eext 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 poinhphc6 h8r,d4f:cbr5d5 *lbzh t 30 m 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 rollehhb*p d:h56hr48l b5cfrc zd,r 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 constan2wzz4 onony. y5/(o4ju mokg )t velocity of 5.0 m/s. What power must be delivered to (zjy)o n4k4n.ugwoz /5m oyo2 the 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
本平台(https://autodiscover.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, 2026-6-1 04:24 , Processed in 0.261454 second(s), 114 queries , Redis On.