Exam+1+--+Unknown+Year+--+ANSWERS+_do+not+distribute_ -...

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object is acted upon by only the two forces F1 and F2 shown diagram. The magnitude of the resultant force on the object N) is about t ,";. .jl'l -' 'i. (A) 87 (B) 42 (C) s8 @,, (E) 30 {ry, 90 sia ?O = zS^l 6'll N Fz!' 5o cos bo 4 4.bN tra='lv?il.J * q" t lbk3-P' Z. AI1OO-kg car is initially moving at 30 m/s when the driver steps on the brakes. If the braking force exerted by the road on ih. tires is constant and equal to 6000 N, how long does it take for the car to stop? tr* = lp0co:4O'5zN e (g' bOsn tD 'aot'l r- ^, (A) 3.2 s . - (B) 5.1 s .f (C) 5.0 s /rrr.r \*,/ Fr:60N @) 4.8 s (E) s.7 s V, Vo + A-e Q z 5O ,,tls +'1ra/sz t -30 '-ls ' - S.'*lt' L _ 36r*_l.r --_=- . L - 5 r*ls* Us "k 4rn' 4- \*'/ ,..,^Ar J-','-u,.ryr, v,fao^r fn$= rn^- . ,^/vatN I )+*-l+ ' ,,1+ -- O bo6ON = fnA- c vnut vlr,? -bry'^ tl,Sr, O tZ)O I -'7 - 5*l(-L rv'; 3. Which one of the following statements is true about a car rounding a circular curve at constant speed,? JXIT cu experiences an outward resultant force t p'ftfieresultant force and the acceleration are in opposite directions D ' LCJ the resultant force is opposite in direction to the velocity vector /@)the resultant force is perpendicular to the velocity )Fitne acceleration
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l A 4. A book is resting on a table. Consider four forjes which arise in this situation: (l) the force of the earth pulling on the book; dil.*o (2) the "normal" force exerted by the table on the book; (3) the force of the book pushing on the table; (4) the force of the bookpulling on the earth. ).Among the following pairs, which one consists of n'action-reaction" partners which obey Newton's third law? (A) 2 and 3 (B)l and 3 (C) 3 and 4 (D) 2 and 4 @tand2 5. A man who normally weighs 750 N stands on a scale placed on the floor of an elevator. While the elevator is moving, he notices that the scale
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This note was uploaded on 07/11/2011 for the course PHYSICS 125 taught by Professor Unknown during the Spring '08 term at University of Michigan.

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Exam+1+--+Unknown+Year+--+ANSWERS+_do+not+distribute_ -...

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