Solutions_HW_1

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Unformatted text preview: Assignment Previewer http:/lwww.webassi gn.nct/v4cgi [email protected]_sigﬁments/ preview._tp1 ..--......................--.--.....--...-....__._-......-..-......-.-..........._--..-.-_.................-...-....................-._...-.-..-.-2..-....-.A;...;....... 1. HRW6 1.13.005. [51703] 013 points Earth is'approximately a Sphere of radius 6.37 x 105m (a) What is its circumference in kitometers? ' 14 {9 k w a 3M 1 : l‘ﬁir '— tbﬂﬂﬂwﬁy v‘tkm (b) What is its surface area in square kilometers? 1.. I 510mm" x km2 ’4’” “P (c) What is its volume in cubic kilometers? 1- 09 y ’2' K km3 177 l‘ 3 a. . if? I W 2. HRW6 1.P.002. [504901011 points Two type of "barrel" units were in use in the 1920s in the United States. The apple barrel had a legally set volume of 7056‘ cubic inches. The cranberry barrel, 5826 inches. if a merchant sells 60 cranberry barrels of goods to a customer who thinks he is receiving a pie to??? 3 if _ What-is the discre anc in the sbi ment volume in liters? 5-93-49 2. ~ ( - ) ' ' - , XpL y p C ("an £0059»? I r ' a. .5429! 10f6 3. HRW6 230.02. [180987] 015 points Figure 2—13 gives the velocity of a particle moving on an x axis. 13:0 Figure 2-13 (a) What is the initial direction of travel? ml {=0 7),; negate f‘ can Not determine 8/1308 8:23 AM i E t 3 Assignment Previewer i—xl 93L I 63/169!) Uéﬂgui’ij WW X . - t‘ can. Not determine pér fir/CZ CPOngi-g 1‘ negative rcanNot {V6 git] ' determine 0‘“ ’ f ' IA 9% (2265; _ 5/5’iﬂ5 ’5 / _ ﬂag/Q141ng I fze WS 066 Mid’é’ﬂ (e) lsotant or varying? ii Jr be .7, _ . Pva in - - t" Garlingt ée-Cawg ‘7’ 40205 ‘ (5 determine ILLe, SLM em; 6/? 7),..t (teensre/QL 5 (2%)! ﬁaéé mega" Mm / rS 4. HRW6 2.CQ.08. [180988] 014 points in Figure 2-15, a cream tangerine is thrown directly upward past three evenly spaced windows of equal heights. CT: CW T0413 él‘ike’ 2 of 6 8/15/08 8:23 AM http:l/[email protected]/previewIf}? Wmuu- . Assignment Freyiewer ' - . http:l/www.webassignnetl'vétcgiphils @lsu/Iassignments/preview.th Figure 2—15 (3) Rank the windows (greatest first) according to the average speed of the cream t g.- ' e while passing them. . ‘ 1‘ a ’3 M (LT 5085 «70 vie-“J m 1/:739‘3 t I“ all tie (b) Rank the windows (greatest first) according to the time the cream tangerine takes to pass them. ' - by: yea/9+ U) t7 0” 25;. I [Decayua Que/M- t ; wort?) wdéde '9 Jamie’s” afar-1} if" up?) . ‘H’rﬂ C it»; cynic/\$25 (c) Rank the windows (greatest first) according to the magnitude of the acceleration of the cream tangerine while passing them. par gala ._ -6) \$0 Jim/59. “5‘6 (d) Rank the windows (greatest first) according to the change in the speed of the cream tangerine during the passage. r3,1,2_ R ﬂy,“- V», vs 53 t d 9.!ng gov: V429 algae Cm A) 3 of 5 ' I . 8/15/08 8:23 AM 1‘ all tie Assignment Previewer tof6 6. HRW6 2.P.034. [52223] 013 points 0 l 2 3 4 Two trains, one traveling at 7’9 km/h and the other at 145 km/h, are heaoeo towaru one ' another atong a straight, level track. When they are 940 m apart, each engineer sees the other's train and applies the brakes. The brakes .decelerate each train at the rate of 4.0 m/sz. _ http://wwwivebassi gn.net/v4c [email protected]/aé,si gnments/preview1p1 5. mm 2.P.'oo7. [522041016 points The pesition of an object moving ina straight line is given by x = 52‘ — 6 f2 + "H3, where X is in meters and tin seconds. ' ' (a) What is the position of the object at t= “ls? 'm What is the position of the object at 1‘: 2? I CI 2- 2? m What is themﬁmsnimtion of the object at 1‘: 3? t iye -em gWhat is the position of the object at 1‘: 4 s? l 341 em - . (b) What is the object's displacement between t= O and t= 4 s? AX “exalme A 3 3g m 1 37’2— -= .0 (c) What is the average vetocityfor the time intergft’fggm 1‘: 2 s to 1‘: 4 s? "t K We Vi v'c 1 E’J‘. = /95 «q-a (6) Graph X versus tfor 0 <= t<= 4 s and. indicate how the answer f: on the graph. (Do this on paper. Your instructor may ask you to tur'r' Lu 0 0 position (m) M m OC) 0 o - 21.9 “G O Qa3%' time (s) - C: 0t 2 - l “’81 (a) What is the braking distance for the first train? 2 1%! Km ' Niel/stricter I ’(b) What is the braking distance for the second train? WWI V452: q. l 9’] r ox=‘ ” t 1 X m NE A L 24 c is there a collision? “Mr” _ 2. I ~LZLWU 5 - : _______._.—--_ - r not enough “Hml L l' ﬂea ,_ .22) - r “5” __ m 5’” - we” '4??? >9: ‘ " Assignment Previewer ' http:l/wwwxrvebassign.net1'[email protected]/previewIPl information I a 7. HRWB 2.P.024. [52216] on points how long would it take to reach a speed of 104 kah from rest? y: ya eat an??? as V = 299/972 Lil-é 7:30 ._ r f“ The head of a rattlesnake can accelerate 50 We2 in striking a victim. if a car coulddo as well, I . 7 (A :— "‘ (dgmﬂ/anj A hot-air balloon is ascending at the rate of 13 mls and is 64 m ove the ground when a package is dropped over the side. a u: t 1g I": 2' _ 2.. F (A (a)'How long does the package take to reach the ground? (7'9 l Eds thWay‘é-fct LO ([0) With whats 'eed does it hit the ground? ? “AJAX/a 35 “4310/: _. i -l- 3 E 9 at m/s . U9 2.1690) ' Ligﬁﬁi) I 8. HRWB 2.P.059. [522321012 points . Vb 2+! 3 “’5’ 9L = i' 5””?ﬂ/S ' j i *3 - 1 7)” ~+ t: —- dr — - '3 a. ?- ﬂ/J ' . 9. HRW6 2.P.049. [52227] 011Boints A key falls from a bridge that is 42 m above the water. it falls directly into a model boat, ' moving with constant velocity, that was 12 m from the point of impact when the key was released. What was the speed of the boat? Lay- ; Jr, 2 M up 1 0 at: -439.“ 1‘: 1D. HRWG 3PM. 4. [166433] 011 points 1}; 9 b 7 11. HRWS 3.60.04. [181062] 011 points Given that d = a +b + (-c), which of the following are true? (Select all that apply). 50f6 ' ' ' ' _ - snsros 8:23 AM . Assignment Previewer __ I _ _ I http://wwwwébassi gn.net/[email protected]ﬂassignments/preview.tp1 @(d tc-‘(D w [3‘ ~98:— (L’b .-“u..—“unmq.-......u....--_..-..-...-....--.-.-..-.--.---'---.-.---.--.-..---...................-.....-.--—-~—.--uq--..uu.-............-.....-....-..-.. 12. HRWB 3.P.O10. [56506] 0 points A car is driven east for a distance 51 km, then north for 30 km, and then in a direction 27° east of north for 2-2 km. Draw the ve or diagram and determine the total displacement of the car from its starting point. Magnitude Eskm' Direction 1 K" (counterclockwise from east) Assignment Details ﬁle/k me 5 of 5 _ _ 8/15/08 8:23 AM ...
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