Donna drove to the mountains last weekend. there was heavy traffic on the way there, and the trip took 8 hours. when donna drove home, there was no traffic and the trip only took 4 hours. if her average rate was 45 miles per hour faster on the trip home, how far away does donna live from the mountains?
Answers: 1
Physics, 22.06.2019 03:30
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The drag force, fd, imposed by the surrounding air on a vehicle moving with velocity v is given by fd = cdaρv 2/2 where cd is a constant called the drag coefficient, a is the projected frontal area of the vehicle, and ρ is the air density. an automobile is moving at v = 80 kilometers per hour with cd = 0.28, a = 2.3 m2, and ρ = 1.2 kg/m3.
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A980-kg sports car collides into the rear end of a 2300-kg suv stopped at a red light. the bumpers lock, the brakes are locked, and the two cars skid forward 2.6m before stopping.the police officer, estimating the coefficient of kinetic friction between tires and road to be 0.80, calculates the speed of the sports car at impact. what was that speed?
Answers: 3
Donna drove to the mountains last weekend. there was heavy traffic on the way there, and the trip to...
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