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Exam1.1 Solution

Exam1.1 Solution - S tudent ID last f irst Scol'e 1 1...

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last Student ID _ Scol'e __ first 1. 1 Dimensional Motion [22 pts] A park ranger driving at 11.4 mJs in back country suddenly sees a deer "frozen" in the headlights 25 m away in front of him. His reaction time before stepping on the brakes is 0.25 s. He applies the brakes and slows with an acceleration of 3.80 mJs 2 A. [5pts] How far he travels before the brakes are applied? C;..o .. \~ ~ed 6.'I..-1J o t bY- = Lt\·4 Yv\ I ") ( D .25 ~' D'f,. ~ ;;t. _ vY\ B. [6pts] How much distance is between the ranger and the deer when the car comes to a stop? Co\t\s- 0\.\'\ -t 0.. c~e.- ~ r Q-\,\O Y'\ '. i'5'Nl e- -\-YL"~vei' J 'L (\ I 2. 2- ( I. /) 2 a~ I::;. X.;; AJ - va _ (D~ - \\.'""t 'S \ 1- .\ """ apptt~ i~ . 2- 2. ( - MIS 2) ta (OI.¥.eS . C. [5pts] What is the stopping time from the moment the ranger sees the deer? .e-- c\.v: to C\cL~ ~. O. '2.,. 'S So 'l'<L ~"'o V\ ~ ~""-L vJ - JJ..eJf' '\-t- -\--c\ \:- S b -to 5> To P ; (V [, .= 0) ;j1\"\J:>\.\ D. [6pts] What is the maximum speed the ranger could have and still not hit the deer? ctc.e.ep+Ctb( e. ~"-Qte. -( ~X .-\f o,.\}e' 2.. "r L- !l ,../ . V " .-:::: et-OY( If -I'\j .) '2... ~ 2.. CA'6,.X ..... 'i'",;)} c 9...(--0 ,~) »YS2-~ (2-5.

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