Don't forget that most of the men driving in F1 are petite men, about 120 to 130 pounders, usually about 5'-5" or 5'-6". She could, with physical training, handle the physical stresses
it's questionable but maybe. it does take strong abdominal muscles and connective tissues to handle 4-5 g lateral and 6+ g braking for an hour and a half...without making mistakes. just a few more each way than she's doing now
there are taller drivers, current #1 Jenson Button is about 5'10-11", Kubica and webber are near 6'. Hamilton is about 5'9" at least, but half this game is 90% mental.