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 Unit9: Static Equilibrium, Elasticity and Fracture



 作者: admin   总分: 44分  得分: _____________

答题人: 匿名未登录  开始时间: 22年07月27日 22:54  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 condition or conditions are necessar v80n d-bd21hik)w rbfy for rotational equilibrium?

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  
  What condition or cond0d7c8m6 (wp 6uduqkfi itions are necessary for static equilibrium?

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  
  A book weighs 6 N. When held at rest above your head the net force on the0qaee h05spbv06 -mt v book i-e0vsh a6pm50 0qvbets

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 rocket moves throughe x+l k+:a-byusgg;y / outer space with a constant velocity of 9.8 m/s. What net +; ua/l y: y+-egkgxbsforce acts on it?

参考答案:    

标记此题
5#
 
  180

参考答案:    

标记此题
6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A person weighing 800 N stands with one foot on each of two bathroom scales.u 7wo2u9h2avx Which stateme2uxh2v a9wuo7 nt is definitely true?

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  
  A heavy boy and a liagcd15 i-hf n-ght girl are balanced on a massless seesaw. If they both move forward so that they are one-half their original distance from the pivot point, what will happen to the seesaw1if5 hcd -nga-?

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  
  A cone balanced on its small end i.6sj lm8v22er1 wiv.ztc /rbus in

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  
  A cube resting on a horizontald,h8oqdj-o; i (i1c, xxp h;zv tabletop is in

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  
  Consider two identical bricks, each of dimensions 20.0 cm x 10.0 cwn4sud6 n5j 7d)uohse p.1yc0m x 6.0 cm. One is stacked on the other, and the combination is then placed so that they project out over the edge of a table. What is the maximum distance that the end of the top bric4neuysd p dwj)5h0u 1 os7.6nck can extend beyond the table edge without toppling?

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  
  A 36-kg round table is :ca(q0p 0nk*i652dz re: *6.sjx cjn bnngoc ksupported by three legs placed equal distances apart on the edge. What minimum mass, 0 kcxr(oe*6:c0 n pakz5n2 bnjsj: i*c6qn.dgplaced in the middle between two supports on the table's edge, will cause the table to overturn?

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  
  Stress is

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  
  Strain is

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  
  A mass is hung from identical wires made of alumi ,50wz(c qbubwnum, brass, copper, and steel. Which wire will stretch the z5w qw u0c,b(bleast?

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 copper wire is found to break when subjected to minimum tension ofzlzv0k+w c1 gd2 *:tsa 36 N. If the wire diameter were half as great, we would expect the wire to break when subjecl 0wzas:2*cdgv tk +z1ted to a minimum tension of

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  
  The horizontal component of the buttressing force at thmtj6w/ l-3 sgqe base of a pointed arch iss3gm-q6lwt/ j

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  
  A lever is 5.0 m long. The distance from the fulcrum to the weight to b( :okcbhk sh)-e lifted is 1.0 m. If a worker pushes on the opposite end with 400 N, what is the maximum weighthk: cbos-k)(h that can be lifted?

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 lever is 5.0 m long. The distance from the fulcrum to the weight to be3cb;m5l hp z cq z/u;s(/ t2wwwl7mms. lifted is 1.0 m. If a 3000 N rock is to be lifted, how muchqpzb sm.zc /253luw;s/mlc;( w7wh m t force must be exerted on the lever?

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 boy and a girl are balanced on a massless seer*92ju yn87eeq3rn x ip:w hm0saw. The boy has a mass of 75 kg ae8uye 90j7n*np2mq hxwirr :3nd the girl's mass is 50 kg. If the boy sits 2.0 m from the pivot point on one side of the seesaw, where must the girl sit on the other side?

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  
  Two children sit on opposite ends of z3ujkrlssnh,:-lg4y - +- rrma uniform seesaw which pivots in the center. Child A has mass 60 kg rj:l--s srg+k-n,l hr 3m4y uzand sits 2.0 m from the center. Child B has mass 40 kg. How far from the center must child B sit for the seesaw to balance?

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 uniform board of weight 40 N supports two children weighing ((d-- 1 mk)z8aupkezvnc gn s.500 N and 350 N, respectively. If the support is at the center of the board and the 500-N child is 1.5 m from the center, what is the posia(s m--c.18k)n(zkdn u pez vgtion of the 350-N child?

参考答案:    

标记此题
22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 10-m uniform beam of weight 100 N is supported z(a2 w bkguo72*ypmz) by two ropes at the ends. If a 400-N person sits at 2.0 m from the left end of the beam, whawg2 zmy) u7*p2obka (zt is the tension in the left rope?

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  
  A 10-m uniform beam of weight 100 N is supported by two ropes atm/qohjno/9 .c(lj mc: the ends. If a 400-N person sits at 2.0 m from the lqlm:j (//h.9 cnoomjceft end of the beam, what is the tension in the right rope?

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  
  A massless scaffold is held up by a wire at each end. Tcky *b;)yk.il2hkr* ghe scaffold is 12 m long. A 300-N box sits 4.0 m from the left end. What g.k*)iykk*hyr l ;2bcis the tension in each wire?

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  
  A 200-N scaffold is held up by a wire at each end. The scaffold is 18 m long. t jn4k 04c*q6) mejvoyA 650-N box e n4v) cj04kojyq6*tm sits
3.1 m from the left end. What is the tension in each wire?

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  
  A uniform meter stick is supported by a knife edge at the 50-cm mark and hw/ 0p j (n0q3tuywx3aeas masses of 0.40 kg and 0.60 kg hanging at the 20-cm and 80-cm marks, respectively. Where (at what mark) should tw 0py0w aeqnuj/x( 33a third mass of 0.30 kg be hung to keep the stick in balance?

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 500-N person stands on a uniform board of weight a 73rye5dabo az27zd (100 N and length 8.0 m. The board is supported at each end. If the support force at the right end is three times that at the left end, how far from the rightb2da7aoa7y 5 (edzr 3z end is the person?

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  
  Two scales are separated by 2.00 m, and a planktf2 acn;:br3s of mass 4.00 kg is placed between them. Each scale is observed to read 2.00 kg. A person now lies on the plank, after which the right scale 3 c2fnstba:r;reads 30.0 kg and the left scale reads 50.0 kg. How far from the right scale is the person's center of gravity located?

参考答案:    

标记此题
29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two telephone poles are separated by 40 m and cows8 wu8z5miy +cjm qoy .fb851nnected by a wire. A bird of mass 0.50 kg lands on the wire midway between the poles, causing the wire to sag 2.0 m below horizontal. Ass+m8ybq8 i15z5 s8u.jwcomfw y uming the wire has negligible mass, what is the tension in the wire?

参考答案:    

标记此题
30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Assuming the lower arm has a mass of 2.8 )nwxm(h:w3mr i* z ov4kg and its CG is 12 cm from the elbow-joint pivot, how much force must the extensor muscle in the upper arm i*n h:w 3(m)4vzmxworexert on the lower arm to hold a 7.5 kg shot put (Fig. 9-1)?


本题所包含的其它图片:

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 passenger van has an outer wheel base width of 2.00 m. Its center of gra96dqd n ;nu6)f94i patx mp/mvvity is equida xd9 fi pq9/mt;4pdvu n)m66nistant from the sides, and positioned 1.20 m above the ground. What is the maximum sideways angle at which it can be inclined without tipping over?

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  
  The Leaning Tower of Pisa is 55 m tall and about 7.0 m in diameter5w:s8kb - ( np5oqpwzq. The top is 4.5 m off center. How much farther can it lean before it b(sp5qw:zo8p-qwk5 n b ecomes unstable?

参考答案:    

标记此题
33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 5000-N force compresses a steel block by 0.0025 cm. How much force e;(jj e+bblm 5lv*k.o5 p /xgmwould be needed to comp o(+m 5*ebglkpbl . jmejxv/;5ress the block by 0.0125 cm?

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 cable is 100-m long and has a cross-sectional area4e 5oq,qoa iwco,htb00bai2y r874ru of 1 $mm^{2}$. A 1000-N force is applied to stretch the cable. The elastic modulus for the cable is $1.0 \times 10^{11} \; N/m^2$. How far does it stretch?

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 steel lift column in a service station is 4.0 m long and 0.20 m in dii ,e0456 au k6 ffylt+dcq,nzd0 kw;wrameter. Young's modulus for st d4zywdk+6 ;ralfieunw, f,0q06c kt 5eel is $20 \times 10^{10} \; N/m^2$. By how much does the column shrink when a 5000-kg truck is on it?

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 wire of diameter 0.20 mm strvxn y1hr6wu1(etches by 0.20% when a 6.28-N force is applied. What is the elastic11w v 6(hyrunx modulus of the wire?

参考答案:    

标记此题
37#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A mass of 50 kg is suspended from a stee(/ nb4barj2, efqzfq- l wire of diameter 1.0 mm and length 11.2 m. How much will the wire sb jq2a/,(n4fq-fe bzrtretch? The Young's modulus for steel is $20 \times 10^{10} \; N/m^2$.

参考答案:    

标记此题
38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Suppose that an 80-kg person walking on crutches supports all his guvxyklnx 720:x( l ej:/ysj(weight on the two crutch tips, each of which is circular with a diameter of 4.0 cm. What pressure gn k:y xxelx(sjju/2(y70 v:lis exerted on the floor?

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  
  A bridge piling has an area jmvrp)br c2026 e :zyiof $1.250 \; m^{2}$. It supports 1875 N. Find the stress on the column.

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  
  An aluminum wire 2.0 m in length and 2.0 mm in diameter supports a 10.0-k4w jej6c 0ikf1 3otj3zg mass. Wi6cjk1 t0zw 3o43 jefjhat is the stress in the wire? (The Young's modulus for aluminum is $7.0 \times 10^{10} \; N/m^2$)

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  
  An aluminum wire 2.0 m in length v) a1 s l9mjthh1vfd.+and 2.0 mm in diameter supports a 10.0-kg mass. What is the elosm)1+.lh vf1dv9a jt hngation of the wire? (The Young's modulus for an aluminum is $7.0 \times 10^{10} \; N/m^2$)

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  
  A shear force of 400 N is applied to one face of an aluminum cube with sides of :2p-vr+9oefd ,x rwhi 30 cm. What is the resulting relative displacement? (The2:h9fwpi vx e,+-rr do shear modulus for aluminum is $2.5 \times 10^{10} \; N/m^2$)

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  
  At a depth of about 1030 m in the sea the pressure has i6 8me: +wfvbbk af8q+:iyd7 i lk8e(qlncreased by 100 atmospheres (t 8v: m(e7qiyw:6 fbd8ae+f qk+bikll8o about $10^7 \; N/m^2$). By how much has $1.0 \; m^{3}$ of water been compressed by this pressure? The bulk modulus of water is $2.3 \times 10^9 \; N/m^2$.

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  
  A 55-cm brass rod has a diameter of 30 o b/n )ew) eu+f(j8ivvj8oa,-1pef t)n7iu zu cm. The compressive strength of steel isf(jieufu )wjnivp+v) o n81 u8,)z tbae7o-/e $250 \times 10^6 \; N/m^2$. What is the compression force that would break the rod?

参考答案:    

  • 答题人:
  • 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 44 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, 2024-10-5 04:42 , Processed in 0.270252 second(s), 109 queries , Redis On.