The final speed is the fastest speed that any free fall can reach. Each object has a different final speed based on mass, gravitational force and resistance force. Isaac Newton discovered that gravity was a force applied to objects on Earth. He also calculated that the acceleration rate at which the object falls is -9.8 m / s ^ 2 or 1 g, and the gravity force on the object is 1 g x the mass of the object. This means that if you had to fall from space and enter the earth, you will accelerate by 9.8 meters every second when you are in free fall, if the Earth does not have an atmosphere. The air that you failed will add resistance to your fall, preventing you from accelerating at a speed of 9.8 m / s ^ 2.
Air resistance or resistance force is another variable acting on objects in a state of free fall. Traction acts against gravity and has many variables that indicate how an object should fall, a deceleration. The way it works - the force of resistance counteracts gravity by applying an upward force. The surface area of the object, speed, air density and drag coefficient are variables that determine the resistance force. How aerodynamic falling object determines the drag coefficient. The faster the object falls; more resistance is imposed on it. The state of the final speed is reached after the resistance is equal to the acceleration.
As the object falls, the speed of this object increases, and the air resistance increases, but the acceleration of the object remains. An object falling in free fall on the Earth has a constant acceleration of 9.8 m / s ^ 2. When the resistance force becomes equal to the acceleration, the object will remain at the same speed or final speed. Since the resistance force depends on the size of the surface area, weight, aerodynamics of objects and air density, each object has a different final speed. There are many objects that reach speed limit very quickly, while others are made to take more time or not even reach it at all, if possible. For example, a rocket has a very aerodynamic tip that helps it cut through air density, because the rocket speed reaches speed. The rocket will reach a top speed much slower than a parachute or even a man freely falling from space.
