The images depict the basic stages of sky diving. These are:

1. Jumping out: Upon jumping, the sky diver begins accelerating at a rate of 9.8 meters per second per second in free fall. Within a few seconds she will reach maximum speed.
2. Falling freely: Sky divers usually jump from a height of about 3000 meters and fall freely for about 45 seconds before opening the parachute. The top speed reached, known as terminal speed, is about 52 meters per second. Falling from very high altitudes, where the air is thinner and the drag force is less, can produce higher terminal speeds.
3. Slowing the fall: Usually the parachute is fully open by the time the sky diver is 300 meters above the ground. The parachute causes rapid deceleration and allows the sky diver to make a steady descent, using the control lines to steer.
4. Landing: The sky diver pulls down on the control lines to achieve a safe and steady low-speed landing.