# Is it necessary to know initial y velocity to solve this projectile motion problem?

A marble is launched horizontally off a 93.0-cm high table causing the marble to land on the floor 1.85 m from the base of the table.

a.) How long was the ball in the air?
b.) With what velocity must the marble have left the tabletop?

Wouldn't another piece of information be needed to solve this problem?

Is it implied the initial y velocity is 0?

-

Yes it it implied that the $y$-component of the initial velocity is zero because the problem states that "the marble is launched horizontally."