* Gravity's Pull: Earth's gravity constantly pulls objects towards its center. This means that as an object travels upward, gravity exerts a force on it in the opposite direction of its motion.
* Deceleration: This force of gravity causes the object to decelerate, meaning its speed decreases. The deceleration due to gravity is approximately 9.8 m/s² near the Earth's surface.
* Zero Velocity at Peak: As the object continues to travel upward, its speed decreases until it momentarily reaches zero velocity at its highest point. This is the point where gravity has completely overcome the initial upward velocity.
* Free Fall: After reaching its peak, the object starts falling back down, and gravity now acts in the same direction as its motion, causing it to accelerate downwards.
In short: The speed of an object thrown vertically upwards decreases because gravity constantly acts against its upward motion, slowing it down until it eventually comes to a stop at its highest point.
