test0233

test0233 - Page 3 10. Three masses are located in the x-y...

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Unformatted text preview: Page 3 10. Three masses are located in the x-y plane as follows: a mass of 6 kg is located at (0 m, a m), a mass of 4 kg is located at (3 m, a m), and a mass of 2 kg is located at (0 m, 3 m). Where is the center of mass of the system? '1 X~m~.£"";X; ';1'1,0-= 6iq12.~Iz..k;; a. (1 m, ~: ~~ :: h13 2 m) ~ :~ @ (1 m, J Yh 0.5 m) (rt1 :: K (fJ~Ol ~rj(2){o) + {~ -:x ~ £,.v7'! /2- yc~=~f-d2(~)~ I L. - I ML ;:: ~ r;;-;::J 11. A 900-kg car traveling east at 15 m/s collides with a 750-kg car ~~ r~1traveling north at 20 m/s. The cars stick together._ What is the speed of \Jf ~:.:} the wreckage just after the collision? 20 ii1e (d c... co((t.siUV}C v:z..) c @ 25. a m/ s p~~..: Po 12.2 (; ) ~ C) -.f::c, -/ ~ VI b. m/ s J?/", Vl. == H, 1i'fL V f 511f tSL -" 1, U (I)\ [C~(~+G)(.) e- 4 1 MyVy12. Q.- ~ n m/ s rx (,., r'f c. 35.0 m/s d. 17 . 3 F:; rn V .::;;.("" -f1'f,J VpCV',)<Sl I ( V.p= !!lV' ~t/2.1 ttl ) (uS(}- - f-:jJ .., D,\;/~ CM,y")/{..,,v,) ;:: -t~t,~ (,.".f lWhen a mass of 25 grams is suspended from a certain spring and lowered slowly until the spring stops stretching, the spring stretches 2.0 cm. What is the spring constant of the spring? (Q f a. 1. 25 N/m ~F~.£ -"'5':- 0 /L ,-~.:: .(Jl" b. 0.80 N/m 5 (/ (O.(}J.;! c. 7.85 N/m "_ I It:: co / 12.3 N/m DJX (II/) -f'l1J (!2'5 r f f.. _ Fe tL- )-- )('1,., ;x- -== >< @ 13. II! ~,L..J,_--- '1f q 1::7 tJ/:y Two children are riding in a merry-go-round. Child A is at a greater distance from the axis of rotation than child B. Which child has the larger centripetal acceleration? (a-";) child A b. child B c. neither; they have the same centripetal acceleration d. there is not enough information given to answer the question 5q;,~ / b,..J (ZA- '( 1<6 C4{f)4- ! CCi(r\s ( ...
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