I'm a math guy taking engineering classes more or less for fun, so some of the stuff I should know I probably missed in a basic dynamics class. I feel really dumb that I can't figure this out. I'm in a vehicle dynamics class and I have to calculate the constant thrust T for the following situation: I have a jet-powered drag car that weighs 3220 lbs and goes from 0 to 260 mph in a quarter mile. The drag force is D = 0.006*v^2, D is in lbs and v is in ft/s. We are to neglect the tire rolling resistance so only T and D affect the movement of the car. We are also told to use 0.002378 slug/ft^3 for air density. For some reason, I have no clue how to calculate the thrust in this case. I'm used to mass flow rates and exhaust velocities. What am I missing that presumably makes this problem so easy? Thanks for anything you guys can offer.