An object falls from the transco tower in houston and takes 15 seconds to reach the ground.
what is its velocity at impact?

Impact velocity = 147m/s

Explanation:

Impact velocity means the velocity of an object when it just falls on the ground. It is the maximum velocity obtain by an object before it stopped by something.

Given data:

Initial velocity =

Time = t = 15 s

Gravitational acceleration = g = 9.8 m/s²

Final velocity = impact velocity =

According to first equation of motion

As inial velocity is zero so

                  Impact velocity = 147 m/s

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be