Exam2Solution - Total paints: I!) X [0 =10” 1. A car is...

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Unformatted text preview: Total paints: I!) X [0 =10” 1. A car is moving along on a flat circnlar turn of radius 20 m. The coefficient of static friction between the tires and the road is 0.60. If the mass of the car is 2000 kg, what to what maximum speed can he drive round the turn without skidding out of the way? A. 13.4m/s r: 20m B. 10.8m/s c. 118m/s [U : 0v 6 D. 5.4m/s E. 15.2m/s m L 2000 We,» lQHMU/ {1 [As H . 2 a i"— P‘S‘WKMWjfi/t 3:, Q3§L@s> Kyla: W7)” 9 U’zmag o~éxz0xa~8;llo~?ml§ 2. A body, subjected to a force 0 F = (4xi~ Syj) N, moves from the origi to (x, = (12 m, 0). What is the work done by the force on the body? A. OJ r4 1,) H A 2: $2; I: : (tweet/H N I D. 194k] E. 288] ' h _ (0, 0) We {2% 0);:7 LCM/«yogic Jaye; W0 cum I?) in 4x 2 :2. Q - 1 z 2 p w— 4x4 F» fl”): — 2. 12 (0 :!ZS’QJ 3. A car (800 kg) has an initial speed of 8 m/s and is accelerated along a straight line at 7 m/sz. If it travels 30 m while being accelerated, what is its increase in kinetic energy? A. 57k] . ‘3: i223 m 2 @900 12g, Bf 5413;] a : 7mzz<> L AX 3 go W‘ .LxgaoxlllC-L l: : mm» : 8007C7 : 5900 A) ,— «Alzllé k0 WC Em)? : FAX _. 5‘500x3»0:158007i16@<3 A v’lvtll'v’ftxl/ UTFl—T' v "””"‘\ J9 L” U? AX : 2% 7X 30 l: 42 O 644/5) 2’ ‘ , .r ! \‘\-- e w—rfi—A —«_..,‘__,,.,. - “m .‘f "1 . Marti; Bull/MW l‘li'pnv'mm “an .. r , l/ H i \ “Maul l Mmz’_ 1 ....Ir;~,1 .r ll 4. A block ice is pulled to the right along a horizontal frictionless surface by a constant horizontal force of 50.0 N. Mass of the block is 10.0 kg. The block’s speed afier it has moved a distance of 5.00 m is A. 50.0 m/s m 2 i0 ‘14? B. 14.1m/s , ‘ ,Db—FV c. 10.0m/s : IO Lilah rl—‘r. :,. m D. 7.01 m/s E. 5.00 m/s l: " b 0 : (LE—HA W: 11/57: Pbx:gv><b’: 2500’ 2 [FL hing/2Tb, 42 Mr theorem .59 W7: J,ymj vi mvb m 2 f: cl " ’“ ‘ r.— L V v 0 L; w 2,; muff Z L ‘ ,( 2) 250 :.§.% .0 x v; 2; V; e 50 9M I mlfi] 5. A ball of mass 200 g is attached to the end of a cord of length L and Whirled in a horizontal circle. The speed was increased until it broke at v = 12.0 m/s. The maximum tension the cord can withstand is 50.0 N. The radius L of the circle of the motion should be A. 58 cm B. 12 cm C. 48 cm D. 1.02 m E. 2.00 m t: L ............................ .............. f l; : ll 111/4. Max 7" W " hmx :. 57:} . v:> Newton/5 Second lam) : w 7:— m r l “W "72M 6. A 2kg block of wood moving with a speed of4 m/s hits a relaxed spring and shown in the figure below. How far wil t mill“; R :50 0 my Bjjwla ‘ E mend/Dd, Wtalvmh‘fir {/9041 '. +ul~ : KN Up 2 0 (x:WVLiF/’9§§Il )1 mo '1_ » 2;. 32 2 R 3 0 O y. ‘— n I ‘7)”; 31A ..—. I'A 1:\ l 7. A 100 g bullet hits a stationary block of wood (see figure below) with a speed of 300 m/s and gets embedded in it. To what height h does the block swing after the impact? 6 _ v I 00 My . C0166 fl/afi‘G/m Of LCwUr-V WfifiWw/Wm'w 1 Pt: RC ‘, "\ \. t~quéooywlév) 0 Z "‘5 : [39 ; @O-3t¢1[4 100-) I \At [71 max. [484F643ij m flag?” ,VLB K. E_ Mg:qu flaw/Lg Maximoth v2 z 4%. wt , ,M _ 032 v ‘ X *- .1 9 4X98 : [4-6 mm 8. A merry-go-round is spinning at the speed of 4 rev/s. It is then slowed down to in a time interval of 1 rev/s in 4 5. What is the average angular acceleration of the motion? How much more time does it take to stop completely if the angular acceleration is maintained the same? A. -1.5rad/szlg._zs,.. \ rev :- l'n’ radians B. 451316351354] 9 _ . . {05’ * a ' / . 9 t - \ . D. 4.7::d/:2,155 a“ i _' 4VQb/o ‘ 4X “277 i (877— rfigg/d E. —3.5 rad/52, 1.5s M315 : i (EV/t3 ” 7J7— Yai/d x t : 45 (42% : LL? f W 2 .._ lwfign', gem“ 75 T-Zt’ 9. Three masses m 1 = 2 kg, m; = 5 kg and m; = 3 kg are placed at the comers of a right triangle as shown in the figure. What is the location of their center of mass? If a net force of 20 N acts on the system of particle, what is the acceleration of the center of mass? l/l/l‘:2l/Lg/ X,:O/>/i;o y w A ~-, ‘ W2 “ g I) lAQ/ X233m Vi: O m .__ t . 5 -31a~,><5 :0/ X5: 3m Xe“ : ‘43 3‘ Wt: Z W) C in, + m2 7L m 3 : Lfféifi, a. , 3‘ you = ZMVYLZ‘)’9_1M+3> ‘7?)- h l - l)’. + WLYZ +Wl¢5 43. Kyla/v r 2 20 N i F: More.“ : 6w : F/M 3 emswi—ag 10. A 500 kg elevator moves in 20 seconds at constant 5 eed up from the first floor to the 80th floor of a i ding, gheigh difference of 200 m. What is the average power that the elevator motor delivers to pull up the elevator? M = 71.41 500 1% /l:/\ ; ZUULM L 9—09‘ VV : @J/\ C Whiz/[Ce (JV/mm 'wa elk/MICE WW) :- svox ClXX’ZW / «— 6ng >< :03 q ‘ l 3 P: W : 4520700 :4QXI03 W»: [401 kW DJ? 20 ...
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This note was uploaded on 11/16/2010 for the course CHM 2220 taught by Professor Andreana during the Spring '08 term at Wayne State University.

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Exam2Solution - Total paints: I!) X [0 =10” 1. A car is...

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