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F Shgt tLs wot +)(.-iln I 1. A block of n:ass Mis held motionless on a ftictionless inclined plane by means of a string attacired to a vertical wall asshown in tlie drawing. {y, F'[nr'*qtt Assurne the plane has f iction and the string breaks. wrat nrinimuin value of the coefficient of static fricton, p,, would pr.u# flre block fiom sriding dow' the i'clined plane? @ t*e B) sin d C) zero D) cos d E ) 1 2. which expression isfalseconceming the vectors shown in the sketch? A A ) A + B + P c^:A1 C 1 A ' + B ' D ) C + A = E) C<A+ C = 0 B - 7 2 - L / _ B B PageZ

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3.Aplrysicsstudentinalrotairba]loorrascendsverlicallyatcorrsta:rtSpeeo' consider ur. rorio*ingfou, forces that arise in this situation: a*4 Ft = the weight of the hotair balloon Fz = th" weight of the studeut -- Fg = the forc?of the student pullir:g on tlie earlh Fa = the f"t;; ;iii;t hot air balloon pulling on the student ,.,' Wlrich two fotces forrn arr ,,action-reaction,, pair that obeys Netton's tlrird law? fi, ,ll' lf gtand Fa - Ef \ arid Fz 6 vrand F3 -.-- b rrandF3 - E) Fz and Fa Abasketballislaunchedwitlraninitialspeed"|8.9Y:ylfoliowsthetrajectoryslrown. TIre balle'ters trr.;;ilJ';;6 t ;ft"t it is tuu"ctred' What are the distanoes x andv? Note: The drawing is not to scate' r/- " s , La 5-? rl . 3 co: {5' 5'1"1 Ybt 4. { y ' r s r n t { f ' 1 5 ' b \$ ' l I l l - X = V . ) t i o a " l ;''; r"('*l rW -5''13) 7t7 m 5 . / r n 5 . 4 m I 5.4 m 5.4 m v 0.91 m 0.73 rn i .5.4 m 0.9i m 0.73 nr , . \ | \= S,L{I('1b)rv (-t.*l(,,*,#:' ' 11'r' ,xT B) c) 6) "-p) Page 3
5. A Uatt is shot straight up fio'r the surface of the earlrr with a'i'itial speed of i9'6 ni/s' Negrect any elfects arieto air resistanr.. lto* mucir ti're erapses between trre trxowing of the bajlarrditsreturrrtotlreoriginallaunclrpoirrt? 0 ^ IJ 0 A) l) c) D) E) 8.00 s 4.00 s 2.00 s 16.0 s 12.0 s ,,?('*"i n t \ 1 L l , 6.Aspring-loadedgunisairrredlrorizontallyarrdisusedtolaunclriderrticalballswithdffirent ittitial speeds,The gun i, u,-" n*9 noriiio' above the floor. Tireballs are

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