# Engineering science

posted by Shah

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?

1. bobpursley

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.

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