What changes take place when a skydiver jumps out of the plane?

When a skydiver or any object falls towards the surface of the Earth, it initially accelerates to around 9.8m/s^2. This acceleration is due to the force of gravity acting on the object. As the skydiver falls, he experiences air resistance or an upward force of friction with the air particles. And after some time the force of air resistance balances the force due of gravity. At this point, the skydiver stops accelerating and moves at a constant velocity. And this applies to any object falling through a fluid, in this case, the fluid is air. The terminal velocity the skydiver reaches depends on the object. Some objects experience a greater force of friction due to their shape so they will have a lower terminal velocity.