4) A reasonably powerful car's engine may produce 200. horsepower. If the car has a mass of
75...
Physics, 11.02.2020 02:49 reaperqueen21
4) A reasonably powerful car's engine may produce 200. horsepower. If the car has a mass of
750.0 kg, and starts from rest, calculate the car's speed after 10.00 s of acceleration at this
power. The following subparts will guide you through this calculation:
a) Convert the power to appropriate units.
b) Calculate the amount of work the engine does during the given time interval.
c) Calculate the final speed of the car.
Answers: 2
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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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