Homework Answers
a)
v = dr / dt = d ( 9.6 t i + 8.85 j - t^2 k) / dt
v = 9.6 i - 2t k
======
b)
a = d v / dt = d ( 9.6 i - 2t k ) / dt
a = - 2 k
=======
do comment in case any doubt, will reply for sure . Goodluck
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