# Slick Projectiles

**Classical Mechanics**Level 4

Two projectiles are thrown horizontaly, from the same place but with different velocities \(v_1 , v_2\) and to opposite directions. What is the separation (in meters) between the projectiles at the moment when their velocities are perpendicular one with respect to the other?

Numrical values: \(v_1=1\text{ m/s}; v_2=4\text{ m/s} ;g=10\text{ m/s}^2\).