First off, thanks to all who helped me on my last questions. It is greatly appreciated that you are willing to help alleviate my physics stress! I am sure there will be many more questions to come. In fact, here is another physic's predicament that I am stranded over. Background: I am doing a project dealing with a car (Jaguar S-Type R). I have calculated the power (P = E/t) and the Kinetic energy (KE = 1/2mv2) Question: If the engine generates a constant power of Pavg, calculate the time it would take to accelerate from 0-30mph, 0-40mph, etc. I know the speeds (v0 = 0mph, v = 30mph), mass (1847.48kg), power (171.3078Hp, or 94219.284 ft-lbs/s), and Kinetic energy (664,537.1725J) So, can I calculate the Force by converting 94219.284ft-lbs/s into Newtons? I really do not know what ft-lbs/s can be converted. If I was able to determine the force of this car than I could use Newton’s second law equation: acceleration (Sum of Force)/(time) this would determine the acceleration; and then I could determine the sec by using this equation: a = change in v/ time I think I am completely off track, if any one could help me it would be greatly appreciated!!!