A man throw a ball upward with velocity of 30m/s.1.5 seconds he throw anothe wih the same velocity. Identify at what high will te ball pass one another?
same height?
h1=30*t-4.9t^2
h2=30(t-3)-4.9 (t-3)^2
set h1=h2
solve for t. Notice it is a quadratic.
with t, now solve for either h.