Where v is the final velocity (in m/s), u is the initial velocity (in m/s), a is the acceleration (in m/s²) and s is the distance (in meters).
find v when u is 9 m/s, a is 7 m/s², and s is 28 meters.

The final velocity v is 21.74 m/s.

Step-by-step explanation:

Given:

To find:

Solution:

As we know the third equation of motion is represented as

Substituting the values u, a and s in the above equation we get

the answer is -81 is the answer