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Online Homework 1 Solutions

Online Homework 1 Solutions - 1 versus t I This graph shows...

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Unformatted text preview: 1: versus t I This graph shows the position of an I object as a Emotion of time as the I object moves liorwan'l and backward along a straight line. position in meters a] At what time other than t = I} s does the object have a velocity of seem? {Roma to two significant digits.) b} At approximately what time is the object moving fastest in the positive dimotion? [Round to two significant digits.) 1:} What is the approximate velocity of the object at t = l5 5? {Date digit only.) :1} What is the first time alter t = I] s that tho-ambition oftho object is zero? (Roomi to two signifieant digits.) 63) fiblfflflglfmm WIW 5%. 7‘“) t (5th M Win :fi'rb) 5:) tau—m aha-g. ( mew WM QMI i thaw mmaJ-Jc:lcig (32a. A) it he... m com“: «to». 1M mroamaakaMtadwb-(wnflma ii £50105 :{flw J ’l‘D fl} v versus t Fm sutemehilc metres thwart! and backward on it straight highway. The ‘5 graph shows the velocity of this automobile as sfilnutinn of time. 3 velocity in metersfseccnd __.——-—.-———-—-—-— -1n :1- Ci J n "MK 5}] W L U ‘3.“- ..__/ a} At what time after t = t} s is theautcmehilc stepped? {Reund to twe significant digits.) 1:} What is the acceleration of the suturichilc st tEll 4 s? (Round to two significant digits.) c} What is the acceleration at" the autcmchite immediately alter t = I} 5? {Round to fear significant fiigits.) 41} At t = 5 a, how far is the sutemchilc from its t = I] initial pesitiun? [Raced to three- .significant digits.) 1:} What is the average veiccity cf the sutcmehile ever the first 5 set-neitttls'iI [Round in two significant digits.) a) 14:: quasi (uSLum was} 59:11.: EM OE s—(i‘; mice. a} {zQS Using) sash A at! a, 2 <1: ("BED—\Z—n- sL— iD—Ofl (“5-333 iD—G Jfl c.) dim C “D " ‘7” _#_r :16} a: HST—D bf. Accelerating Object Anohj'ectstmtsattim'ct=flwifl1:t velccity flf‘i'h. = +15 mfg and mldergeee acnnetant acceleration of I Effffffiffl'f/tfffllfff!filliiifffifffi' 13 m, 3 =- I . a] m m time duet: thc'speed effi'Je-ebject reach zero? 4“” h)1-Iaw far {mm its starting {t = 011mm“ is the. object at‘fimuqe L c) At what time does the object again pass through the starting {t = G) peeiticn? d) It‘the abject had initially;r been moving twice as fast {.30 Ian's]. haw far wculd it have gone before its vetecity reached zero? 6) Suppeee a second object begins moving wiflt a constant speed ()err = 15 mi: in the same directien from the same lccctien at the game fime as the object In part [d]. At what time do the paths urn-Jase hue objects once again cross? Braking Car A ear traveijng at a speed Gf‘l". = 33 In}: stops mummy {that is? its'deeeleratiun is constant} ever It distanee of d - 172 In. a} “mat is its accelerafien during the time it is stepping? {Be careful about the sign!) h} Haw lung [what amuunt .u'f time] does it take for the earth some to a step? us} After the ear has gone MB of the stopping distance, what is its speed? d}lftheearhadheengoing lflnflshuthadstoppedinflle sameti=1flmdistanee.what would its acceleration have been? :51) ‘51—- d:: 2RD}. 0" K5201? Rags} t ,1 s "5" - (”3:3 “/0 _ ow __... - _ +4.2 Jab 0“; 2([9130 (“j—‘— 9 aw ‘3—‘ {us—Oi— +'-—? {— : HEEL n GL 0 1— ME J ; “Us. "Ll'lme'L (___.—. I G) ‘3‘“ {3+ 9‘15"” mhn ens?” _ _l' —I—-- -—I Bali Thrown From Cliff £121? A man on the edge ofa elifffl #39 III high throws a hell directlyr upward. It returns past him 11 3 later. (I! actually is the height of the point of release of the hall above the has: of the oiifl". Neglect air reeietanee.]_[Hlnt - Gravity causes a downward eeeeleration at the rate g = 9.31 total.) a) With what initial speed did the man throw the hell? h) Howr high above the point of release did the ball go? o) What is the wood of the ball when it passes him on the way heel: doom? :1} HOW long after the men throws it does the hall hit the gonad at the bottom ofthe olift? '1.- @ iiiufl'r‘jfi‘he’c .L 0:0 4' “not! %cfiif Jr 15(51.le\ to; i .. (ii-if .3 Z 1 102: 011$ Catch the Ball A ball iethmwn straight up in the airaten initie! speed nfflfl IBIS. At the same time the ball is IhremL a person standing T0 111 1111-11111I begins to me toward the met where the ball will land. Hew fast will the We have to 11111 to catch the ball just before it hits the ground? w o:— t: +m1§a§t “5&3 3;)ch *fj: 6,125. '15? EM dawn ...
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