Hi, it's my first post. Thanks for letting me join your forums as I learn physics. Here is the problem: A stone is thrown vertically upward at a speed of 35.30 m/s at time t=0. A second stone is thrown upward with the same speed 1.390 seconds later. At what time are the two stones at the same height? I've used kinematics to get the time for the stone to reach maximum height as 3.6 seconds, for what that's worth. I've been trying to figure this one out for a while, and am effectively lost. Anything to help me get in the right direction would be extremely appreciated. Thank you for reading.