Fall from flying airplane

Classical Mechanics Level 2

An airplane is flying horizontally at a height of \( 500 \text{ m} \) above the ground at a speed of \( 100 \text{ m/s}.\) If an object falls freely from the airplane, what is the magnitude of the speed of the object at the moment it touchs the ground?

Gravitational acceleration is \( g = 10 \text{ m/s}^{2}. \)