by JohnD » Tue Apr 05, 2011 6:37 am
Amir,
I fear that's still the wrong interpretation.
Here on Earth, a human body falling from a 'reasonable' height, which might be taken as low enough not to need oxygen, will reach a 'terminal velocity', when the acceleration under gravity becomes equal to the decelleration of aerodynamic drag. Falling froma greater height, where the atmosphere is thinner, will allow the body to reach a higher velocity. A recent attempt to drop from an extreme height, when it was predicted that the faller might approach the speed of sound (another variable with air density), was aborted when the ballon flew off without the capsule (Oooops!)
On atmosphereless Miranda, nothing will slow the faller's inexorable acceleration under gravity, except of course final contact with the surface. There is no terminal velocity except zero, in a very,very thin layer of tissue on rock or ice. That Terran terminal velocity and the velocity that a falling body would reach down this cliff are the same is a coincidence. It's not even interesting, because it has no significance.
John
Amir,
I fear that's still the wrong interpretation.
Here on Earth, a human body falling from a 'reasonable' height, which might be taken as low enough not to need oxygen, will reach a 'terminal velocity', when the acceleration under gravity becomes equal to the decelleration of aerodynamic drag. Falling froma greater height, where the atmosphere is thinner, will allow the body to reach a higher velocity. A recent attempt to drop from an extreme height, when it was predicted that the faller might approach the speed of sound (another variable with air density), was aborted when the ballon flew off without the capsule (Oooops!)
On atmosphereless Miranda, nothing will slow the faller's inexorable acceleration under gravity, except of course final contact with the surface. There is no terminal velocity except zero, in a very,very thin layer of tissue on rock or ice. That Terran terminal velocity and the velocity that a falling body would reach down this cliff are the same is a coincidence. It's not even interesting, because it has no significance.
John