* Gravity is the force pulling an object downwards. It's the primary force responsible for an object accelerating towards the Earth.
* Terminal velocity is the maximum speed an object reaches during freefall. It's the point where the force of gravity pulling the object down is balanced by the force of air resistance pushing it up.
Here's how they work together:
1. Initial Fall: When an object begins to fall, gravity is the only force acting on it. This causes it to accelerate downwards at a rate of approximately 9.8 m/s².
2. Air Resistance Builds: As the object falls faster, it encounters more air resistance. This force opposes the downward motion and increases with the object's speed.
3. Balance is Achieved: Eventually, the force of air resistance becomes equal to the force of gravity. At this point, the object stops accelerating and falls at a constant speed, which is its terminal velocity.
Factors Affecting Terminal Velocity:
* Gravity: Stronger gravity (like on a larger planet) would lead to a higher terminal velocity.
* Object's Mass: A heavier object has a greater gravitational force acting on it, but also more inertia. These factors tend to balance out, so mass has a relatively small effect on terminal velocity.
* Object's Shape and Surface Area: A wider or flatter object experiences more air resistance, leading to a lower terminal velocity.
* Air Density: Thicker air (like at lower altitudes) creates more resistance, leading to a lower terminal velocity.
In essence: Gravity is the force that starts the fall, while air resistance limits how fast the object can fall. Terminal velocity is the point where these two forces are in equilibrium.
