I was curious what some factors may contribute to free falling objects not falling at the same rate as would be expected in a vacuum. I remember from physics classes that two objects should fall at the same speed regardless of their weight. I know that surface area and air resistance plays a factor (like a feather vs a ball), but it doesn't seem to explain everything. What i am mostly thinking of is a truck going off of a jump, it always nose dives. Surface area I wouldn't think would play a factor since vehicles are mostly uniform. One explanation i have heard is that the front goes off the jump first, and therefore begins falling first. However, when you watch this in real life it usually takes a long time for the front to nose dive, i would think it would nose dive much faster if it were just a matter of the front falling first. Second example seems harder to explain and i dont know if i would believe it if i didn't just watch it on Mythbusters. They dropped a car from a crane and it nose dived. Then they corrected for weight making the front as heavy as the back. When they dropped the car with good weight distribution, it fell flat. Why should the weight make a difference?