Rocket Question~~Max Velocty and Ff

[physicnoob101]

Homework Statement

ok, so i need to find max velocity and force of friction of a model rocket. The rocket weights 83.8 g, accelerates at 5.78 m/s^s. Its max height is 84.99 m. please help

Homework Equations

ok for Ff = μ_kF_n
as for V_max i have no idea

The Attempt at a Solution

ok so i found F_n = 82.266 N because u have to convert grams to kg. Thats all i can figure out.

 

[LabGuy330]

a little confused.

is the acceleration constant?

if so then how does it have a max height if it is constantly accelerating?

or is it an initial acceleration?

 

[physicnoob101]

the question is related to my model rocket we launched a week ago, the accceleration is average from initial to the max height. don't know if that makes sense.