A tractor-trailer is traveling at 90 km/h when the driver applies his brakes. Knowing that the braking forces of the tractor and the trailer are 16 kN and 60 kN, respectively, determine
(a) The distance traveled by the tractortrailer before it comes to a stop,
(b) The horizontal component of the force in the hitch between the tractor and the trailer while they areslowing
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