Joshmckenna

Okay, Lets say two stones hit the ground at the same time. However, this is not necessarily true. The reason is rooted in the concept of air resistance. In the case of extreme air resistance, where a falling object experiences a drag force equal in magnitude to the gravitation force, the object reaches a terminal velocity. Terminal velocity is the result of air resistance slowing the stone's acceleration to zero. Vt = Root(2mg/CpA) Even if the objects do not reach their terminal velocities before they hit the ground, the denser stone still should hit first, because air resistance is unable to hold it back as much as air resistance can hold back the less dense stone. Air resistance depends on the contact area of the object with the medium. When the object has a high mass and low contact area, then the weight is more significant than air resistance. Conversely, when the object has a low mass and high contact area, then the weight is comparable to air resistance. This means that the stone that hits the ground first will be theone that has the highest mass-to-contact area ratio. Hopefully this clears up any questions if this was occuring outside a vacuum.