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A ranger in a national park is driving at 47 kilometers per hour when a deer jumps onto the road 72 meters ahead the vehicle. After a reaction time of t (s), the ranger applies the brakes to produce an acceleration of -2.6 meters per second squared.

What is the maximum reaction time allowed if the ranger is to aviod hitting the deer? Answer in units of (s)

Vi = 47 km/h

d or delta x = 72

a = -2.6 m/s^2

delta t = ?

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# Homework Help: Please, can someone help me with this reaction problem!

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