[Padgett]

Well you are half right. The rotational component does add 100lbs to the rear and takes 100 off the front. But if you remove the lever effect (is the above) the purely vertical component (500 lbs) is split between the front and rear axles. What gozinta must match the gozouta.

So if you had a ridgid beam there would be 100+250 added to the rear and 250-100 added to the front.

However a car is not a rigid beam, there is a longitudinal flex compontent (aka structural rigidity and why the roll cage in my Corvette was a suspension component) as well so the weight hung out the back affects the rear axle more than the front. By how much, I do not know, depends on the vehicle, but somewhere in the muddle.