• First seconds, the parachutist is falling faster (accelerating).
• As velocity increases, the air resistance will increase, (up-forces= weight) which leads to reaching a constant velocity called “terminal velocity”.
• When he opens the parachute, the air resistance increases so he slows down gradually (decelerating)
• But decreasing velocity leads to decrease the air resistance.
• When he slows down the forces become balanced again, leads to constant velocity again “terminal velocity”
• When he touches the ground his velocity reach zero in no time.
• His weight downwards equals the push of ground to him upwards.
Felix Baumgartner [14-10-2012] free jump 120000 feet live