A cell phone is sitting on the passenger seat of a car. When the car is...

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A cell phone is sitting on the passenger seat of a car. When the car is...

A cell phone is sitting on the passenger seat of a car. When the car is going 50 km/h and stops in 3.5 s or less the phone slides off the seat. What is the coefficient of static friction between the phone and the seat. (Assume the seat and the road are perfectly horizontal.)

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