Online Homework 6 Solutions

Online Homework 6 Solutions - Twe Baxter's Bexeer I efrnass...

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Unformatted text preview: Twe Baxter's Bexeer I efrnass m. = jflflfl kg is moving dawn the railroad track with speed v” = 4 mfs. 1t collides and eoupies to hex-ear 2, which is initiallyr at rest. Together they;r move dewn Lhe traek at v.- = 2 mfs. a] What is the mementh e-f hex-ear I befere eelliding with bexeer 2‘? in] What is the mass of bexear 2? a) w mmmmm :i wm Bullet Penetrates Catt Ur ——|- =;. -- ...._... ___ ___- ..--. ..... A bullet of mass l]. W: kg and initial speed fill me“: penetrates an initially statinnaryr pep can efmasa U. 194‘ J" kg and emerges with a speed 295' mic. How fast is the can moving after the bullet emerges? [Frietien between lite can and the Eu rl'aee is negligible.) Billiard Ball Collision Lot A hall of mass n1 # 2.2 kg moving with a speed of ‘t-‘n = 111.3 mfs strikes an identical ball which Was initially at rest. After the collision, the incoming hall {halt 1] goes ofl' at t}; = 24“ relative to its origins} direction and the struck ball {hall 2] moves offal El; = 34" as shown in the diagram. a} What is the magnitude of the initial momentum of the two hall system? b} What is the ratio ot'the halis’ final speeds? c} What is the final speed of the incoming hall? d] What is the final speed of the struck hall? e} What magnitude of kinetic energy was lost {to sound, heat, etc.} in the collision? = me; :- (s.1hfl(10.3mii)=E$-3—k‘bmfl *1" “er i3) 6%. item Newtmm “M d; '1 {3" : Waging-l __.- (TM—1 Sir-‘91... it. 3 t We’Li 15+ guesseswmcmwctmctc“ WJD -_ mqmfil «t- (Hamlet-$1 “U97. 6;. w m {£581. + and}! 311%”? Fifi-HF tin-boil magi! F r18 21'1" — d) a u. ‘3" 4mm “L gimp [ mtfi‘Z 5— EWPFEWD ———— q.) [LL= él’fifijfl Rf; 'imdjly Lmi} : %'(1ll%)(mf%rL—v I:M'LFL -— T. [31) Car—Truck Cnilisinn A blue ear with a mess of m“,- = 2111} kg and a yellow truck with muse mm“ = 9041} kg enter an intersection. The truck eemes frem the south at em; = ti Inn’s, and the ear eemee From Ihe wesL When the We collide they,»r stick tegether and slide at an angle oft] = 39“ nerth ef'easl. £1]th is the speed ut' the pair after the eellisien? b] What is the eastward eernponent of the mumentuln of the pair after the eellisien'? :1 At what speed was the ca: traveling before the eellisien? d] What is the kinetic energy efthe pair before the collision“? e) What is the kinetic energy of the pair after the eeliieien‘? c9 mirage-Md} =im¢+mgfi¥$fii9 Gt 0” a “‘t i L ma mm m9 (@0%w3\/6 m/J\ ‘— ( 1133an my? '_-.__ I:I “Emma .77 x. Exploding Spring A mines spring nt'spring constant 2:? Him is placed between two carts. Catt ] has a massflf=5igande2haa alumni: =2.5kg.ThecaflsaInpu5hadtnwaIdnne amthu' until the spring is compressed a distance L! m. Th1: carts are than rnlcaand and the Spring pushes them apart. Alter the carts are fine nfthe spring, what are their speeds? [,1an mommiU-v L1, I:th 4 BE? Lam-L “nu. ma $m§ m ifimficyp ( SF“H$\- Efiwm 'L-j 9.900 PELQU Lit; 139 M Mt ma mun-flit: . O - MIKE-1 + MQGL mt: 12w.er + tan; a: wig-343. ‘1; M"- .L Mai) =/-hfi 4-N'L\ ‘57:. ——-*"”"'_-I I k Jiz cw mfg: [FL -' _ . m .1 ML '54: JL '- L LEE-m Explosion is 60' 60" --------- -- - -------—h I A particle with mass M“ = 1.2 kg is iaimelied in a fireworks display. It breaks into three equal mass fragments as shown in the diagram. Immediately after the explosion. each fragment moves with speed w = 14 oil's. The outside fi'agments eaeli make an angle of fit)“ with the Lit-axis. while the mitldle fragment is aligned Iwith the y-aicis. You may assume that the duration of the explosion was negligible. What was in. the speed et'the on'ginsl particle before it broke up? ...
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This homework help was uploaded on 03/27/2008 for the course PHYS 221 taught by Professor Herrera-siklody during the Fall '08 term at Iowa State.

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Online Homework 6 Solutions - Twe Baxter's Bexeer I efrnass...

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