QuestionDetails: A car is traveling down a hill that makes an angleof 13° with t

Question

QuestionDetails: A car is traveling down a hill that makes an angleof 13° with thehorizontal. The driver applies her brakes, and the wheels lock sothat the car begins to skid. The coefficient of kinetic frictionbetween the tires and the roadis K = 0.55 (a) Findthe acceleration of the car.
m/s2

(b) How long does the car take to skid to a stop if its initialspeed is 25 mph(11 m/s)?
m QuestionDetails: (a) Findthe acceleration of the car.
m/s2

(b) How long does the car take to skid to a stop if its initialspeed is 25 mph(11 m/s)?
m QuestionDetails: A car is traveling down a hill that makes an angleof 13° with thehorizontal. The driver applies her brakes, and the wheels lock sothat the car begins to skid. The coefficient of kinetic frictionbetween the tires and the roadis K = 0.55 (a) Findthe acceleration of the car.
m/s2

(b) How long does the car take to skid to a stop if its initialspeed is 25 mph(11 m/s)?
m

Explanation / Answer

angle = 13 degrees The coefficient of kinetic friction between the tires and theroad is K = 0.55 (a). the acceleration of the car is a = -K g cos                                                     = -5.2518 m / s^2 (b).Initial speed u = 11 m / s final speed v = 0 m / s So, required time t = ( v - u ) / a substitue values we get t = 2.0944 s

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