1. The problem statement, all variables and given/known data Two projectiles are launched from the ground with initial speeds of 100 meters per second. One is launched straight up, the other at a 30-degree angle. How much time elapses between each's return to ground level? Theta = 30 g = 10 m/s Vinitial = 100 2. Relevant equations y = vt - 1/2gt^2 3. The attempt at a solution As you can see in the image, I attempted to use the equations that I THINK were correct for this problem. My professor just threw a bunch of equations up on the board, some of which he said we don't need for now and they're just there to be there...so, hopefully I did these right.