Secure I https://session.mas t/itemv D-83150960&offset-next; borenot Problem 2.3

Question

Secure I https://session.mas t/itemv D-83150960&offset-next; borenot Problem 2.37 . MC Problem 2.37-MC Part A You're driving down the highway late one night et 15 m/s when a deer steps onto the road 42 m in front of you. Your reaction Sme before stepping on to brakes 050 s . and the maximum How much distance is between you and the deer when you come to a stop? Express your answer using three significant figures. Hints deceleration of your car is 10 m/s Submit My Answers Give Up Part B What is the maximum speed you could have and stil not hit the deer? Express your answer using three significant figures. Hints m/s SubmitMy Answers Give Up

Explanation / Answer

vi = 15 m/s

vf = 0

d = 42 m

Tr = 0.5 s

a = -10 m/s^2

x = 0.5*15 = 7.5 m

leaving a distance 42-7.5 = 34.5 m

from the equation vf^2-vi^2 = 2ad

d = 15^2/2*10 = 11.25 m

the distance between deer and car at stopping is 34.5-11.25 = 23.25 m

v^2 = 2*10*34.5

v = sqrt(2*10*34.5) = 26.3 m/s

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