1. Constant Acceleration:
* Gravity exerts a constant downward force on objects near the Earth's surface. This force causes a constant acceleration, denoted by 'g', which is approximately 9.8 m/s². This means that for every second an object falls, its velocity increases by 9.8 meters per second.
2. Increasing Velocity:
* As an object falls, its velocity increases linearly with time. This means that the velocity of the falling object increases at a constant rate.
3. Neglecting Air Resistance (Free Fall):
* In a simplified scenario where air resistance is ignored (free fall), the velocity of a falling object increases continuously until it reaches the ground.
4. Air Resistance:
* In reality, air resistance plays a significant role. As an object falls, it encounters air molecules which create a force opposing its motion. This force increases with the velocity of the object.
* As the object accelerates, the force of air resistance increases until it eventually balances the force of gravity. At this point, the object reaches its terminal velocity, a constant maximum velocity where the acceleration is zero.
In summary:
* Gravity causes a constant acceleration on a falling object, making its velocity increase over time.
* The effect of air resistance limits the velocity of a falling object, causing it to reach a terminal velocity.
Formula for Velocity in Free Fall:
* v = u + gt
* Where:
* v is the final velocity
* u is the initial velocity (usually 0 if the object is dropped)
* g is the acceleration due to gravity (9.8 m/s²)
* t is the time of fall
Note: The above discussion assumes we are dealing with objects near the Earth's surface. The strength of gravity varies slightly depending on altitude and location.
