Quote:
Originally Posted by raaaid
not really if you apply a force of two newtons to a 1 kg car and theres a rolling friction of 1 N applying f=ma you have a constant aceleration of 1 m/s
everybody knows the faster you go the more it takes to acelerate
according what im studying this is just due to wind friction
but I THINK this is also due to rolling friction increasing with velocity which what im studying denies or neglects
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Yes, my point is once you reach a high enough velocity wind resistance (or drag) it requires far too much force to move due to resistance increasing with the square of velocity. Therefore acceleration cannot remain constant due to this resistance.
Power required to overcome is:
P= 1/2 p v^3 A C .
Therefore (ignoring constants) power to overcome increases in relation to the cube of velocity, which is not negligible and is the major problem.