Cause I'm Free Fallin'

In this video, there are people jumping from this very high cliff - they are in free fall. When an object (or a person) is in free fall, the object (or person) falls due to the effect of gravity only. Gravity is equal to acceleration, which would be 9.8 m/s^2. You know this because the force due to gravity on a mass is the same as the weight. We know two different equations for this. A = Fnet / Mass and also
W = M x G. Since force is the same as weight, you can plug in what weight equals for Force (Fnet), which would equal A = M x G / M, and in this equation the mass on top and the mass on bottom cancel out which result in A = G.

As the diver's Fair (the speed or the surface area are both proportional to Fair) continues to increase to the point that the Fair is equal to the Fweight, the diver will then be at equilibrium, or terminal velocity.
The diver opens the parachute so that he will be able to reach the ground with a safe speed, instead of hitting it with a *splat!* The parachute is used to help the diver's speed decrease so that when the parachute opens, the diver will be able to fall freely towards the ground.