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Driving to a Taylor Swift concert one day, you spot an armadillo strolling casually out into...

Driving to a Taylor Swift concert one day, you spot an armadillo strolling casually out into the street. You hit your brakes for 1.10 s, and your 1100 kg vehicle's speed drops from 16.0 m/s to 9.50 m/s.

(a) What was the net force exerted on your car during braking?
Magnitude
____________ kN

Direction — backward or forward ?

(b) How far did you travel while braking?
___________ m

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Answer #1

intial speed u = 16 m/s Final speed v 9.50 m/:s time t= 1.10 s Retardation a 9.50-16-5909 m/s2 1.10 Net force F = ma= (1100) (5.909) = 6500 N=65 kN this force acts backward (-ve singn indicates it) v -U Braking distance S 9.50)2 - (16) 2(-5.909) -14.025 m

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