A skydiver prepares to jump out of a plane. Explain how gravity and air resistance will affect the motion of the skydiver before and after he or she opens the parachute.
Nevermind I answered it
a man drives 30 miles in 2 hours. how many miles he will drive in 8 hours?
30/2 * 8
Sure! Gravity and air resistance play crucial roles in the motion of a skydiver before and after they open their parachute.
Before opening the parachute, the skydiver is subject to the force of gravity pulling them downwards. Gravity is a force of attraction between any two objects with mass. In this case, it pulls the skydiver towards the Earth. As the skydiver falls, their speed increases due to gravity. However, as the skydiver accelerates, the force of air resistance also comes into play.
Air resistance is the frictional force experienced by an object moving through the air. When the skydiver is falling, the air molecules collide with their body, creating a resistance force that opposes their motion. Initially, the force of air resistance is relatively small compared to the force of gravity, so the skydiver accelerates downward.
As the skydiver continues to gain speed, the force of air resistance gradually increases. Eventually, the force of air resistance becomes equal in magnitude to the force of gravity. At this point, the skydiver reaches a terminal velocity. Terminal velocity is the maximum speed an object can reach while falling through the atmosphere, where the force of air resistance equals the force of gravity. The skydiver continues to fall at a constant speed without any further acceleration.
When the skydiver opens their parachute, the dynamics of the motion change. The parachute consists of a large surface area of fabric that acts as a drag device. Once deployed, it drastically increases the air resistance experienced by the skydiver.
The increased air resistance due to the parachute slows down the skydiver's descent. This happens because the parachute presents a larger surface area to the air molecules, resulting in a greater force of air resistance acting in the opposite direction of gravity. As a result, the skydiver decelerates and their speed decreases significantly.
Once the parachute is fully deployed, the opposing forces of air resistance and gravity eventually balance out, bringing the skydiver to a new, lower terminal velocity. Now, the skydiver descends at a much slower rate, experiencing a gentler and controlled descent.
In summary, before opening the parachute, gravity is the dominant force pulling the skydiver downward, while air resistance gradually increases to oppose their motion. After opening the parachute, the increased air resistance slows down the skydiver's descent, allowing for a safer and controlled landing.