Coefficient of kinetic friction between the sled and ground
A sled reaches the foot of a hill at a speed of 6.7 m/s. If the coefficient of kinetic friction between the sled and ground is 0.192, the distance the sled travels before coming to a stop is ____ meters.
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After the police car passes, the observed frequency of the siren is 455 Hz. Determine the car's speed from these observations.
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