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 manufacturegplk)4t+ *l zsr advertises that their car can go "from zero to sixty in 8 s". This 4+tl)gsz k*lp 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 thekt7-a l.1zq9cl0t l tzfph 4l, East (+x direction) begins to slow down as it approaches a traffic light. Make a statement concerning its acceleralkq9 1af4tl7- lzztl0 ,pct.htion.

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 zerolx+/ky,pr 3c7gqypg1weoi5 ., does it mean that the acceleration is zero? Support your a1wk pyeip,+.35qlo7yg rc g/xnswer 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 sajz) m7nc0z :1 r*yhpfpme rate. However, object A accelerates for twice the time as object B. What is * 0jh m)f:7rcynzppz1the 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 statemhc/0nf fv8 xd7ent about the velocity and the acceleration when the ball reaches the hfx8fc0hv7dn / ighest 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(d/v p -h6sq/rp idgf -2wxa6t is dropped from the same building. As time progresses, the diff-vwta/gf6 h ( d2p qd/6psx-rierence 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 accelerates at l hd:cu) (7fvczzz-p:/e:d odke +qp2$4.0 \; m/s^2$ 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 as 5o(w(m:gbk1z uq hq6 constant acceleration of ((6qwq gzokmhb5:su 1$2.0 \; m/s^2$. 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 )o/jsy(m6ez 3lps 7,b aofbp+upward with a speed of 15 m/s on the surface of planet X where the acceleration due to gravity isp(7+s pj/ 6m s3be)ybozfao ,l $2.5 \; m/s^2$. 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 speedsx/zsfc6lo4o)m aw+t : o n 8zx2c4*ss of 30 m/s. (only fill in numerical value in the blankxx z4n 8)4cw*soa :z s/fo2m6ts sol+cs)
(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 y79wyj(yifk3 ,t;wiy 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 ad o;w9lh vb586e pqme6cceleration 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 on yo1xyc*0uvw 8yfzxu n17x0qv cr (1zq:ku 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 external force, a moviesza ,ieeud(tj +8:9 bng 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 turned o5nizy (8mqd g0ff, while traveling in empty space, the starship willgz 8i5q(n d0ym

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 accelera).us6on 71tvp fux/s.d asg c.tionusn xsa71std/6o ).fu.cpg. v results 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 thkv+zq0tve 6 j+w:z/jila z7u;e car. Since a lot of damage is done on the:azvzu0 7 z;j 6qwje/til k++v 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 d3 hwn,xkf56joj02jf this object with force mg, which we will f5nj ko jxw06h3,jfd2 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 thei*r,y(/r a wo.lyc,,f petteu 61 sd8qur respective terminal velocities. Which object experiences the greater frdu 8a/ wf q,opestle1r6,( *yc,u .tyorce 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 ceiling of an elevator. hknpj(1--jq*., 1y gch zbdz mThe elevator is moving upward, but slo,zkg1-.cmyz hj1qp( -b*djn hwing 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 down an inclined ri zc 5be-aopdt7x.4hdqr8o*:0k oj0qr, p q,iamp at constant velocity. Thus we can deduce tha ,8-qrxq4iidb ozp k5*ea0c q,dtro70h p.oj: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 elevator.7c.bx7u2m re5d*zlmrb*j lf ) ld g.t: What will the scale be reading when the elevato :.lj.g tb*x*fmu r7re 7lmd5)clbdz2r is 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 machin1 gv,uj1hy.0 nt )ucfhe shown in Fig. 4-1, if M = 0.60 kg and m = 0.40 kg, what is the magnitude of the accelerhfuh1n cg0t v )j,.yu1ation 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 5wnle8cl /7dc-tzo.nqv;mu3100 N in a dire ld3u lc8qc/nwm. veo-z75t; nction 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 shown in F:3 v obh-)4jsnkloiad 5 0i.fnig. 4-2. What are )n:5 jo sbflhoki ai3.nv04d-the tensions 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 a/s*o74 /t5t ywvkwk b-itwc e7re in contact with each other on a frictionless surface.vikwt kc7w5- b t4so*t/w/7ey (See Fig. 4-3.) What is the acceleration 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 asqc5 .uj ldf*0ccelerates 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 inclined plane. The pla xuni)3qn7fz+dj 2n6qne is inclined at an angle2 6dq7qnfxzi+jn )u3n 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 bric: va6nz vit1n)k wall, the amount of work youv ):zvnnt1ia6 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 velocicx6:5lhsi ccw4w6u y)ty carrying a 10-N object, the amoun4 )i65slw cwhx cy:cu6t 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 sign of the work done by gravity whx7w (8y:rkylu s r( p7oq,vgr8il yx(vp r(wqkgr7:y8ulor,7s 8 e the ball goes up with the sign of the work done 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 vd1e 5;pyz p )qu g-q+1bfljann:7q sas19f5qas a car, and is moving at twice the speed of the car. Which statement is true about the truck's kinetic energy compared to that of the c: q+q5gfnqyjp15b as pn f7d91l)-eqzsauv ; 1ar?

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 wx1aa3f-4set qbtcp0/ ;u q4y2b weh *aith speed 4.0 m/s. Both objects encounter the same constant braking force, and are brought to rest. sau2 4y ef1qaxth tw3*0pbceb;a4q/ - 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 system to1wl w4kush29 pt0p 2uh5uvt+vc n8y-t 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. Compare its kinetic energy K, to its pot vq mri5gg r. 7jk-n/.c+i1tbvaiw.6yential energ icm b.n6.ii -7va gtyrg+ vjk.r5w1/qy 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, youg8.air .u/el n(yyt.i did 3 times the work in one-third the time. To do so, yourt.ig(ra.ni/eu . y 8yl 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 movinb3/awe*lp8s x g at 25 m/s, what distance is required to stop a car moving at 5es*p /l3wba8 x0 m/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 rc+*f0hg rf8k w,d en pymt 8b)m4)i/uhill with an initial speed of 4.0 m/s. Neglecting friction, how fast will she be moving after dropping 10 n)frck488detrumw/ +yg,*fi)m p bh 0 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 strme *eu:8+e zbsaight up from ground level with a kinetic energy of 40 J. At the exact top of its trajectory, its total mechanical energy is 140 J. To what verticse mze b+:8eu*al 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 b4z8p n. 0brlyfrom rest 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 nexl .r zb04pb8ynt 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 diq -.7ma .ivpn:3xr ki/5aj ttlp with a speed of 25 m/s (See Fig. 6-2). Neglect friction, what will be the sq :.l.rpi3 att/m x57ajn -kvipeed 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
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 constant velocity oye h17s2su5is6 vy-luf 5.0 m/s. What power must be deliver12l657ss uyueyisv h-ed to 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, 2025-4-5 02:23 , Processed in 0.246125 second(s), 106 queries , Redis On.