What is  a "FREE FALL" (in parashooting)?
350467
Opening your own parachute following a delay as opposed to 'static line' where it opens as soon as you leave the plane.  Normal freefall is around 50 seconds (from c15,000 ft)
172859
The terminal velocity of a falling body occurs during free fall when a falling body experiences zero acceleration. This is because of the retarding force known as air resistance. Air resistance exists because air molecules collide into a falling body creating an upward force opposite gravity. This upward force will eventually balance the falling body's weight. It will continue to fall at constant velocity known as the terminal velocity.\n\nThe magnitude of terminal velocity depends on the weight of the falling body. For a heavy object, the terminal velocity is generally greater than a light object. This is because air resistance is proportional to the falling body's velocity squared. For an object to experience terminal velocity, air resistance must balance weight. An example that shows this phenomenon was the classic illustration of a rock and a feather being dropped simultaneously. In a vacuum with zero air resistance, these two objects will experience the same acceleration. But on the earth this is not true. Air resistance will equal weight more quickly for the feather than it would for the rock. Thus the rock would accelerate longer and experience a terminal velocity greater than the feather.\n\nAnother factor that affects terminal velocity is the orientation at which a body falls. If an object falls with a larger surface area perpendicular to the direction of motion it will experience a greater force and a smaller terminal velocity. On the other hand, if the object fell with a smaller surface area perpendicular to the direction of motion, it will experience a smaller force and a greater terminal velocity.\n\nThe terminal velocity for a skydiver was found to be in a range from 53 m/s to 76 m/s. Four out of five sources stated a value between 53 m/s and 56 m/s. Principles of Physics stated a value of 76 m/s. This value differed significantly from the others. Then again, the value is variable since the weight and the orientation of the falling body play significant roles in determining terminal velocity.\n\nAn object which is falling through the atmosphere is subjected to two external forces. One force is the gravitational force, expressed as the weight of the object. The other force is the air resistance, or drag of the object. The motion of any object can be described by Newton's second law of motion, force F equals mass m times acceleration a: \n\nF = m * a \n\nwhich can be solved for the acceleration of the object in terms of the net external force and the mass of the object: \n\na = F / m \n\nWeight and drag are forces which are vector quantities. The net external force F is then equal to the difference of the weight W and the drag D \n\nF = W - D \n\nThe acceleration of a falling object then becomes: \n\na = (W - D) / m \n\nThe drag force depends on the square of the velocity. So as the body accelerates its velocity and the drag increase. It quickly reaches a point where the drag is exactly equal to the weight. When drag is equal to weight, there is no net external force on the object and the object falls at a constant velocity as described by Newton's first law of motion. The constant velocity is called the terminal velocity .\n\nWe can determine the value of the terminal velocity by doing a little algebra and using the drag equation. Drag depends on a drag coefficient, Cd the air density, r the square of the velocity V and some reference area A of the object: \n\nD = Cd * r * V ^2 * A / 2 \n\nAt terminal velocity, D = W. Solving for the velocity, we obtain the equation \n\nV = sqrt ( (2 * W) / (Cd * r * A) ) \n\nwhere sqrt denotes the square root function. Typical values of the drag coefficient are given on a separate slide.\n\nThe terminal velocity equation tells us that an object with a large cross-sectional area or a high drag coefficient falls slower than an object with a small area or low drag coefficient. A large flat plate falls slower than a small ball with the same weight. If we have two obje
396784
It's to keep your balance.  While you are walking, actually your body is completely off the ground for a split moment.  So, you need to keep from falling on your ass.
915571
Initial vert velocity is zero\n\nfor free fall\n\nd=Vixt + 0.5xgxt^2, d=60, Vi=0, g=9.81\nt=(60/(0.5x9.81))^0.5\nt=3.497487084 s\n  \n\nIf there is no air resistance, horizontal velocity doesn't change
468957
I was able to do it by pulling my butt onto an airplane.\n\nI lost my fear of heights when I was flying through the sky in a aluminum tube at 500 mph.  It's reallyt weird, but I've read about other people having the same results.
469018
I am sure that every one has been to the amusement park and on a ride that drops suddenly.  If so you have experienced zero gravity. Zero gravity is noticed when something is in free fall. For example 2 parachutists. From the ground they are falling due to gravity.  But to each other they are in free fall. Jump out of a plane holding a weighted object (one not affected by wind) As long as you and the object are falling together you are free falling.  Let the weight go and it will stay right next to you. Any airplane that climbs and then you push the stick over, it will drop away from you and you will float unless buckeled in.  Yes that is how they train in the cargo bay of a plane.  No special equipment needed (except the padding helps). They climb and at any point the pilot pushes the stick forward, the plane goes into a dive, and everyone is weightless. Altitude is only determined by: how long you wnat to float and being able to safely recover from the dive.  In the movie Apollo 13, the "floating space sequences"were filmed in the back of a cargo plane that had the space capsule set in it. They were weightless in those scenes. Yes the swimming pool training is very similar to weightless conditions, because they are in "zero bouyancy".
127424
Just another name for the long jump
200232
depends on the kind of fall and the trajectory
489754
Hang gliding is an air sport. It is both recreational and competitive. The sport is closely related to paragliding and gliding (flying sailplanes) but using a much simpler and less expensive craft consisting of an aluminum- or composite-framed fabric wing, with the pilot mounted on a harness hanging from the wing frame and exercising control by shifting body weight.
730425
You could probably try to weigh down your body with some kind of strap on weights or something, then when you jump without the weights, your body will feel less heavy, and you will feel as though you can jump higher
474447
mmmm... first: Never do anything that u know that u can do. second: the pk is not only from high heights, u can do it without a suicidal hole beetwen, just try that crazy gap when u can jump the same height at the floor. third: have fun :-)
520918
abseiling is done with a rope for example, climbing down a clifface.\n\nparagliding is done in the air!
259238
You can't fall if you're in space, because there is no gravity, which is required in order to fall.  If you're in an atmosphere or using centrifugal force to simulate gravity, then you would still fall, but at a slower rate than you would on earth, assuming there is less gravity.
1128483
jump higher than what?
37528
Zero mph.  You STOP when you hit the ground.
112612
Jump with extra weight
1170255
I dont thinki its free, I think i saw something like that on slam magazone. are you talking about the "science of junping" or the "shoes" that make you jump higher? well either way, they are available through slam magazone.