An automobile weighing 2.35×104 N is moving with an initial speed of 80.0 km/hr along a flat highway?
When the brakes are applied, the automobile is brought to rest in 22.0 meters. Assuming that the force that stops the automobile is constant find the magnitude of the applied force?
THEN....What is the time required to stop the automobile in the previous problem?
Update:***2.35×10^4 N***
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a = V^2 / 2 . d = 22.22^2 / 2 . 22 ( good joke ) = 11.22 m/s/s
F = m . a = 2.35 . 10^4 . 11.22 / 9.8 = 2.69 . 10^4 N ( that is the force needed )
Time = v / a = 22.22 / 11.22 = 1.98 s