Intro physics course is beginning to move into 2d kinematics, stuck on the first real question.
a stone is thrown horizontally at 15m/s from the top of a cliff 44m high. what is the velocity of the rock after 2 seconds?
i tried 3(-9.8m/s2) and some other formula's but could never arrive at the correct answer of 24.7m/s. could someone explain how to arrive at this answer and the reasoning behind it?

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia