After a night of watching too much American Ninja Warrior, a student (attempting to impress their friends) leaps off of a short wall, landing on the ground. If the student weighs 42kg, the wall is 1.96m tall, and the student launched themselves off of the top of the wall with a speed of 2.139m/s, what was their speed when they reached the ground? Include Sl units.

After a night of watching too much American Ninja Warrior, a student (attempting to impress their friends) leaps off of a short wall, landing on the ground. If the student weighs 42kg, the wall is 1.96m tall, and the student launched themselves off of the top of the wall with a speed of 2.139m/s, what was their speed when they reached the ground? Include Sl units.