1. Initial Velocity: If the object starts from rest, its initial velocity is zero. But if it is thrown downwards, its initial velocity will be higher.
2. Time: As the object falls, its speed increases due to gravity. The longer it falls, the faster it gets.
3. Air Resistance: Air resistance opposes the motion of the falling object. The more air resistance, the slower the object falls.
4. Gravity: The strength of gravity influences the speed of the falling body. For example, gravity is weaker on the moon, so objects fall slower there.
In a vacuum (no air resistance):
* The speed of a falling body increases at a constant rate called acceleration due to gravity (g). On Earth, g is approximately 9.8 m/s². This means that for every second the object falls, its speed increases by 9.8 meters per second.
* The formula for the speed (v) of a falling body in a vacuum is: v = gt
* where t is the time elapsed since the object started falling.
In air (with air resistance):
* The speed of a falling body will eventually reach a terminal velocity. This is the maximum speed it can attain, where the force of air resistance equals the force of gravity.
* Terminal velocity depends on the object's shape, size, and mass. For example, a feather has a much lower terminal velocity than a rock.
Therefore, to calculate the speed of a falling body, you need to consider its initial velocity, the time it has been falling, and the air resistance acting on it.
