* Air Resistance: Feathers experience significant air resistance due to their large surface area and low mass. This resistance slows their descent significantly, making their acceleration much less than the actual acceleration due to gravity (approximately 9.8 m/s²).
* Terminal Velocity: Feathers quickly reach their terminal velocity, a constant speed where the force of gravity is balanced by the force of air resistance. At this point, they no longer accelerate.
To measure the acceleration due to gravity, you need:
* An object with negligible air resistance: A dense object like a metal ball bearing is a much better choice.
* A controlled environment: You need to minimize the effects of air resistance. This could be done in a vacuum chamber or by dropping the object from a very short distance.
* Precise timing and measurement: You need to measure the time it takes for the object to fall a known distance.
Alternative Methods:
There are more accurate ways to determine the acceleration due to gravity:
* Pendulum: The period of a pendulum (the time it takes for one swing) is related to the acceleration due to gravity.
* Free Fall Experiment: Using sophisticated equipment, scientists can accurately measure the acceleration of objects in free fall (in a vacuum) to determine the value of 'g'.
In summary: While dropping a feather can demonstrate the concept of gravity, it's not a reliable method for determining the acceleration due to gravity because of air resistance.
