{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

test3s5y11all

test3s5y11all - PHYS 1111 Section 5 Fall 2011 Test no 3...

Info icon This preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: PHYS 1111, Section 5, Fall 2011 Test no. 3, version 1 V November 1, 2011 2:00pm - 3:15pm ' \ E \7J N012? Warwmq/‘Zflmmcfloke [mt/am: IJe/‘tfiepmmmwm MEI/(mm) m/brhnmpam F171): yaw-me, SWO, Mmontfiesmnsfim Ibllnayteqtfie prob/a1: Med wimyoll mjbu's'm A» gm» Madman on fie Mme. TRUE/FALSE. Choose 'True' if the statement is true and 'False‘ if the statement is false. 1) When a rigid body rotates about a fixed axis all the points in the body have the same tangential 1) E acceleration. q‘é =-' rd A) True @ 2) The net force acting on an object is equal to the rate of change of its momentum. 2) A I I B) False I F; 1976? MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. FIGURE 1 L V I w 3) You need to load a crate of mass m onto the bed of a truck. One possibility is to lift the crate 3) A straight up over a height 11, equal to height of the truck's bed. The work done in this case is W 1. The other possibility is to slide the crate up the frictionless ramp of length L as shown in Figure 1. In this case you perform work W 2. What statement is true? B) W 1 < W 2 kg 5‘ WC, C) W 1 > W 2 D) No simple relationship exists between W 1 and W 2. .7: ”lab 4) A 0.200—kg mass attached to the end of a spring causes it to stretch vertically 5.0 cm. If another 4) 4 i 0.200—kg mass is added to the spring, the potential energy of the spring compared to the case with only the original mass will be K Tk W2 ‘2'”51- 0 B) the same. )( 2 M)» C) one—half as much. i [A ( f 2 m .. D) 3 times as much. ‘ K : Ii )1 ~ 2 X] E) twice as much. .' kX ._..,. . K jfi‘mq7 [g l MSTEI/(Y/ZI—I-fla‘X/Z: 0726/2 J: kYI'MéCCQ 2% U231 2‘.../ 1—2 «4H! a, s WZ’zgji‘KZW w— n X; 8) An object of mass 2.00 kg starts at - 5) An ordinary light bulb consumes 60 W of power. Through what height could a 1000-N object be 5) lifted expending the same a t of power for 6 hours? A) 360 m ) 1300 C) 720 m D) 650 m E) 430 m Pzfl. : m9 _ A: PAfi (60% 2(2’4005’) {2 At 2:; 9 mg z (00» “KL-E A6; éérsxgfiuhxfiff‘: 214005 6) A ball is tied to the end of an 80.0—cm string and swings in a vertical circle about a fixed center 6) under the influence of gravity. The speed of the mass at the bottom of the swing is 6.00 m/ 5. Which of the following statements is true? R V A) This question cannot be answered without knowin the tension wig; the strin . («Nahum mafenough energy to rea e top of the circle but the string becomes slack before it can reach that oint. C) The ball does not have enough energy to reach the top of the circle. D) This question cannot be answered without knowing the mass of the ball. E) The ball has enough energy to continue revolving in a complete vertical circle. 0’” .11 13> ——_ v L: rj u...» v}; #grtvfi 9‘7” “W 7’”? 775/7“ f (3M0 r- A! l ) VI 2: 55 V 7) A snowboarder coasts on a smooth track that uses from one level to another If the 7) I S snowboarder's initial speed is 4 m/ s, the snowboarder just makes it to the upper level and comes to rest. With a slightly greater initial speed of 5 m/ s, the snowboarder is still moving to the right on the upper lev 's the snowboarder's final speed in this case? A)2m/s B)3m/s C)1m/s WP shown in Figure 2. If the work done by the force of friction is —150], what is the speed of the object as it reaches the bottom of the inclined plane? Use g = 10.0 m/sZ. A) 20.0 m/s @ C) 150 m/s D) 10.0 m/s E)200 m/s . \/I, : 2<hqéli+w~¢ — 28k +2WC 2 A w J“? - a: *- mg 1* MC 3’ m _; lfl/0)(ZO)2+ 2 450) I: IS 3" 9) An 8 kg object moving with an initial velocity of 4 m/ s comes to rest due to friction after it 9) f E travels a horizontal distance of 10 m. If the initial speed of the object is doubled, what distance will i . -1 before coming to rest? Use g = 10 m/ s2. B) 80m C) 10m D) 20111 E)30m 4 0 w (9 W:K;— [C / hire 0 V :2\/,# V2 \\ } 2( z 2”on [V : 2) 10 V1 v1”; :4 ( I41 0 V M K " d" .1: 2 gig-gin: I 10) A freight car moves along a frictionless level railroad track at) constant speed. The freight car is 10) B open on top. A large load of coal 1s suddenly dumped into the car. What happens to the speed ofthefreightcar? 030 Conjqu‘lraa ail mumpmlum p ( PF l Lmeszero 113—” «; m,\/II:(m,+Wr)\/F C) It' increases. D) It remains the same. V; .1 F V” l v < v . E) Cannot be determined from the information given. . m ff pa ’ I 11) An artillery shell explodes in midair and breaks up into many fragments. Which of the 11) A ! following statements are true regarding conditions immediately before and immediately after the explosion: I. The total momentum of the fragments is equal to the original momentum of the shell. II. The total kinetic energy of the fragments is equal to the original kinetic energy of the shell. AW B) Statement II only C) Bo tatement I and Statement/I D) Neither statement is true. k 7 0 R's pf but meckma 2mm“; ,2 0H (onSeIUe/ K ”0/ F B 12) A 3. 0— —kg object moves to the right at 4.0 m/ s. It collides head-on with a 6. 0— —kg object/ moving to 12) the left at 2.0 m / 3. Which statement IS correct? V \/ A) The total momentum both before and after the collision is 24 kg- -m/ 5. ® / _ 2 ML wumw B) The t6tal momentum 5 othbefore and W‘fliéc 0111 SionYiéfo C) The total momentum efore the collision is 0 kg - m/ s, and after the collision is 24 kg - m/ s. D) The total momentum before the collision is 24 kg- -m/ s, and after the collision' is 0 kg - E) 361; of the above is true. ‘8: ml v; MLVL' :(3 l9>{4 [19"[5/(3)(23’— 6’; — P, L0 13) A plate falls vertically to the floor and breaks up into three pieces, which slide along the floor. 13) Immediately after the impact, a ZOO—g piece moves along the x-axis with a speed of 2. 00 m/ s,a 235-g piece moves along the y-axis with a speed of 1.50 m/ s. The third piece has a mass of 100 g. What is direction of the third piece with res ect to the positive x-axis (measuredc unter clockwise)? Considoy I’M/7W; UM Kong erwfiéh ' 0" ”0 1’ / P/_ O A) 41.40 )2210 c) 1390 D) 3190 E) -2210 .6 <2: ) __\ V; \7 [email protected]:. m,\/, my (039 so —7 Mil-7V "’3ngth "0 9 ' Vz—mzfi[email protected] :0 9 M) V1,:m3l/SMLQ {9 (’9 V3 JNIJL @ bag 14) In a particle accelerator, protons are fired at a stationary target and collide elastically with the 14) 4: nuclei of the atoms in the target. In one such experiment, a beam of protons is fired with a speed of 2.10 x 107 m/ s The protons that undergo a collision rebound with a speed of 1.68 x 107 m/ 5. What IS the mass of the nuclei that the protons are colliding against aswng a one'dLmenSiflnngF’llision? l/ 4 2,“), I 71:4") Pl“ Vg 7h” Qgplbton “m5 (77h5(:2/a’/‘0H of I’M/”NI 7‘ W J; S 0 9, proton masses M V)” Vf I I .441 C) 8.00 proton masses VS h/— W /1 \/, / I 7.7 + In} 77 ‘ W” L D) 10.0 proton masses fl”: / I ’ m (I _ \/f/ E) 7.00 proton masses M, 14'"; m C E ‘l’ I) : / 7,7 W Vi/ ’ V” 0"" @ 90 143 (m rm.) ”rm "1}. 0“ KT”): fihflfl' 1%,: ’"’ V” I ’“I "YT—T % C i}? I! (/+ £3”) MPIS) Three masses are located in the x—y plane as follows: a mass of 4 kg 15 located at (0 m, 0 m),a mass of 2 kg' 1S located at (3 m, 0 m), and a mass of 6 kg 18 located at (0 m, 3 m). Where 1s the center of mass of the system? ’38::32‘31) Nmsws 04 (2202—40 W__ ,6”- ,1 ”W .5m-,1|m) : Mmmvemg 4 +Z+é — E)(2m,1m) .: M,‘1, +419 7» my 7;“, 0 4. 5+ 43/ NEW 3) W: VII+VQI+U$ x :,&(9 +54 4009+(4 Oi Aug}. 53 Position (m) 2 4 16) An object is under the influence of a force as represented by the force vs. position graph 1n Figure 3. What is the work done as the object moves from 2 m to 6 m? A)40] B)7OJ C)0] D)3OI I?” H radii I 5‘, M",;:WW , V .1.“ {it no Circuitv ”071,,“ E; 13 5:47th E.: Er +0 Jo 97L (/0 A 15.2; I M, % 142/92.» 7L”P “My” W“? / I l H 19, /me¢4c {Ms/9 {M615 ”,va V,“: [[5 r‘ JJ’M‘ emu/54 #2,, 7779/ V’Pe fa be , - M>V1 2w: (—7 ”(49(3): 3/563 765(7‘ fig) 61— a I 771) 1, 5» (f40"(:3_,i' I f)_ l//,4 17) A child is riding a merry—go—round which completes one revolution every 8. 36 s. The child is 17) A l j standing 4. 65 m from the center of the merry— go—round. What IS the tangential speed of the 1% Vet-Mrgrzn: (MTMPW :1? ms ’ 3- C)1.75m/s U_7.;T 8, 363 D) 0.556m/s g" E)5.64m/s I OK / or 18) A child is riding a merry-go-round, hich has an instantaneous angular speed of 1.25 rad / s 18) (4 and an angular acceleration of 0.745 rad /52. The child is standing 4. m from the center of the merry —go—round. What angle does the acceleration of the child maQrith the tangential direction? r‘ 6% B) 90.0° C) 45.0° D) 255° E) 32. 5° "> Z. “7% am 154%: EL . I...“ w , t q vfzr a: (’7 J“ r‘zxr r‘ fiha /. _Z/4f’ Lil/:MS Veal/M Afrgfi 0743- 19) A Ferris wheel with a radius of 8. 00 m rotates at a constant rate, completing one revolution in 30. 0 5. What IS the apparent weight of a 60. O—kg passenger when she 18 at the top of the wheel? B) 325 N C) 588 N D) 432 N E) 610 N N 36; Mr Vfcmrzzzr 5"" ’AH-ma gran/:2“ / N: mégg :M(j *L/KZ :60 we ‘47:“) @ 20) A discus thrower starts from rest and begins to rotate with a constant angular acceleration of 2./ 2 rad /52. How many revolutions does it take for the discus thrower' s angular speed to reach 613 ‘f—r-N rad/s? A) 9.5 rev 2 0 B) 6.5 rev C) 1.4 re D) 3.0 rev E) 9.0 rev L 9/ l L . NJ (I’fll/ AG: “L 6'33 qozra/ 3W if: / 0 xx 270/ /20)°‘_c_ <9}: ...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern