Understanding the Forces
* Gravity: The only force acting on the object is gravity. This force acts downwards, pulling the object back towards the Earth.
* Air Resistance: Ideal conditions mean we're ignoring air resistance.
Acceleration and Gravity
* Constant Acceleration: Since gravity is the only force acting on the object, the acceleration is constant throughout its entire flight.
* Acceleration Due to Gravity: The acceleration due to gravity is denoted as 'g' and is approximately 9.8 m/s². This means the object's velocity decreases by 9.8 m/s every second as it moves upward.
The Path of the Object
* Going Up: As the object travels upwards, its velocity decreases (becomes less positive) due to gravity.
* At the Top: At the highest point, the object's velocity momentarily becomes zero. However, the acceleration remains constant at -9.8 m/s².
* Coming Down: As the object falls back down, its velocity increases (becomes more negative) due to gravity.
Key Point: The acceleration remains constant throughout the entire flight, even though the velocity changes direction.
In summary:
* The acceleration of the object thrown vertically upwards is constant and equal to the acceleration due to gravity (g = -9.8 m/s²).
* The negative sign indicates that the acceleration is in the opposite direction of the object's initial upward velocity.
