To achieve a speed of 2 m/s, the bottle must be dropped at m. to achieve a speed of 3 m/s, the bottle must be dropped at m. to achieve a speed of 4 m/s, the bottle must be dropped at m. to achieve a speed of 5 m/s, the bottle must be dropped at m. to achieve a speed of 6 m/s, the bottle must be dropped at m.

.

Assumptions:

The object is dropped in a free fall.There's no air resistance.The downward acceleration due to gravity is

Explanation:

Consider the "SUVAT" equation

,

where

is the final velocity, is the initial velocity, is the acceleration of the object, and is the change in the object's position.

For example, if the bottle needs to achieve a speed of by the time it reaches the ground,

since the statement that the bottle is "dropped" implies a free fall..

Apply the previous equation to find the minimum height, :

.

Replace the value and apply the formula to find the minimum height required to reach different final speeds.

Ido not know at all

Kiloleter, mega leterhope this !