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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 hexear 2, which is initiallyr at rest. Together they;r move dewn Lhe traek at v. = 2 mfs. a] What is the mementh ef hexear 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$3—k‘bmﬂ
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Rf; 'imdjly Lmi} : %'(1ll%)(mf%rL—v I:M'LFL — T. [31) Car—Truck Cnilisinn A blue ear with a mess of m“, = 2111} kg and a yellow truck with muse mm“ = 9041} kg
enter an intersection. The truck eemes frem the south at em; = ti Inn’s, and the ear eemee From Ihe wesL When the We collide they,»r stick tegether and slide at an angle oft] = 39“
nerth ef'easl. £1]th is the speed ut' the pair after the eellisien? b] What is the eastward eernponent of the mumentuln of the pair after the eellisien'?
:1 At what speed was the ca: traveling before the eellisien? d] What is the kinetic energy efthe pair before the collision“? e) What is the kinetic energy of the pair after the eeliieien‘? c9 mirageMd} =im¢+mgﬁ¥$ﬁi9 Gt
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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 mommiUv L1, I:th 4 BE? LamL “nu. ma
$m§ m iﬁmﬁcyp ( SF“H$\
Eﬁwm 'Lj 9.900 PELQU Lit; 139 M Mt ma munﬂit: . O  MIKE1 + MQGL
mt: 12w.er + tan;
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'54: JL ' L LEEm 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 Litaxis. while the mitldle fragment is aligned Iwith the yaicis. 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 Herrerasiklody during the Fall '08 term at Iowa State.
 Fall '08
 HerreraSiklody
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