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# exam1F06 - 7777 FIRST HNSuE/z(emacr 77m 1 A riﬂe is aimed...

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Unformatted text preview: 7777? FIRST HNSuE/z (emacr 77m 1. A riﬂe is aimed horizontally exactly at a target on a wall a distance d away. It ﬁres a bullet with a velocity 1;. How far below the target does the bullet hit the wall? (1) (Ml/(21:2) (2) 962/1:2 (3) dial!) {4} Line/2 {5) 9512/2” 77mg balm E: i V _L (J 1_ Distanq {:oUQA a g g l‘ L 7 Z 3 7) 2. HA = 2i -+-j and B = i + 2j, then what is the cosine of the angle between these vectors? (1) 4/5 (2) 1 (3) 3/5 (4) 2N5 {5) 2/3 3E: QKEX + ﬁnfé) 3 2x1 +1x1 : 4. M.» \mmme : fl? we :Sme l 4’ [,3 QL Gjﬂr US , 3'7 ca: (9 ; ——- - S 3. If a particle moves such that x = 2t2 — 8. and y = 3: + 2, what is the speed of the particle when t = 1? (1) 5 (2) 10 (3) «E (4) WK (5) 2 ~11: <13, H s) via) :- 4r E? '9 '1-r’ hit/We \l'r As :3 5>Vj(1):3 4. You throw a ball straight up with u = 10 m/s. One second later. you throw a second ball up with 1.- = 10 m/s. How long after you throw the FIRST hell do they collide? (1) 1.5 s (2) 1.0 s (3) 2.5 s (4) 2.0 s (5) 1.8 s m L=O,¥Lruw Fm LMU up. Le UP upmltue ‘J. I v-LL + in“ r m as!“ ‘11. a \o(t~1) - 5(k-1)L a. was we may). \0§«lo-§<§L+'lo{-5 trtss 77777 77777 5. If the velocity of a article is entirely in the x direction and is given by eh) = (10 — 3:2) mfs . what is the magnitude of its displacement ctween t = U and f = 1'? (in meters) (1) 9 (2) 3.5 (3} 9.66 (4) 7 (5} 1 1(1): on—M‘Ht + 7((0) Xlll'w’) :Uoi~k"]'o "4 C1 6. If A has components A: = 3 and Ar = 4,13 has oomponents B, = 4 and By = 3. and A + B + C = 0. what is |C|'.? (1) Ni (2) m (3) J5 (4) 5 (5) 5J5 , L 93 +aJ+c5<o c) (:47 [6" (WWW) :75. 7. At t = 0, you roll a. bell along level ground with a velocity of 4 m/s. Two seconds later, you roll a. ball in the samc direction his the ﬁrst, with velocity 6 m/s. How far from the starting point does the second bell catch up with the ﬁrst [in meters '1’ (1} 24 (2) 4 (3) 12 {4) a (5) 18 mm 99-: the 3 11-321, etc 4:. ». 44-41 bﬂLL'L ‘X'L- =5 kré L‘r‘l’m 4:: L 1 may“ 24M 8. A school bus is traveling at 5 m/s. A child in the bus throws a. ball out of the window from a. height. of 1.25 m above the ground. Measured relative to the bus, the bell starts with a. velocity of .5 m/s in a. direction perpendicular to the side of the bus. With what speed does the ball hit the ground (measured relative to the ground}. in 111/5? (1) 5J5 (2) 15 (3) 5J5 (4) lib/i (5) 5 m (mum Fitter-.5 nun—mt. \H—ZLMITY km -W :S‘J’iMfl HomumﬂL’. T0 EM? l'lgh’ t-\M&&C\LQA ﬁiJMl—Jj l‘lg' {all I t: 0-5 5 :7 venom. Cemi‘oNENT 0‘? VQLou‘N wHéN Guam) Hi1" U \I -. Qt ‘-' S M’s (Dob-.119) ‘I’o'i‘m vacuum wHt—Zn HﬁTwe (Alamo Ls SUM .3 CF HOMZOJJTRL it VifLTimL (“My ONE-Fl] \V‘L: ’S’J’Ly‘vSL 77777 77777 9. The radius of the former— Janet Pluto is approidmately IOOOkm. And the speed of a. satellite that orbits just above the surface of Pluto wou be approximater 700 m/ s. Which is closest to the acceleration of gravity at the surface of Pluto? {1] 0.5 m/s2 [2) 500 mfg“ (3) 2.5 111/32 (4) 0.025 m/s“ (5) 25 m/s’ 1 a: y: _ 7001 (at) .. Wm‘ ..., 0-5 .M/l1 R |000x|dou ““ IO‘ N 10. You are standing 20m away from a. school building. You throw a. snowball with a speed of {min/s at an angle of 45“ above the horizontal. The snowball barely goes inside an open window of the building. What is the vertical height of the window above the point where you released the snowball? (1} 10m (2) 15m (3) 20m (4) 25m (5) 30m 1,311“ N0 60¢th IT H lT.S AT A PNFT‘ .10 “hanﬂ-S’ : lop-n AND TIME 14m EL. 10 : 2:. R 0L! & . v1 20m 1-; J1 ”A DUNN" THAT'Tmé 'IT DMHED L at“ ; 5(g.}1_. 10a 50 lTHl'ISﬂT (3'. 20-40 :(Um J: 11. The position I. as a function of time t, of a person walkin alo the lecture desk is described by the ﬁgure. At which of the bel points is the magnitude of the velocity of the person greatest? x (1) e- :2) b' (a) c (4) d (s) e HT (a) Sun; I: GAE-ATEIT 12. At which of the labeled points is the magnitude of the acceleration of the person greatest? (1} b (2] a (3) C (4) d [5) 9 HQ) Cumuh‘ruml: is GREHTHT 77777 77777 13. A walker. out for exercise, walks for one hour. He starts by walkinghat 5 miles/hour for 15 minutes. Then he naps for half 15 minutes. What. distance does he need to walk in the ﬁnal our to have an average speed of 5 miles/hour for the entire hour of exercise? (1) 3.75 (2) 2.50 (3) 1.00 (4) 1.25 (a) 2.00 HE NEEQ 1"!) (Quinn, 5 Ml LE5 w FIRST“ Pﬁojf HE URL-IS! .S' 1.15 mum-5 |——"r 1+ N L'KS—r 909:!” He‘. NEEDJ To unuL 9*.1'29’ 1 3‘7? MILGS ...
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