- #1

PearlyD

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## Homework Statement

A Saturn V rocket has a mass of 2.75x10^6 Kg and exerts a force of 3.3x10^6N on the gases it expels.

determine the initial vertical acceleration of the rocket.

**2. The attempt at a solution**

heres my attempt...

F=3.3x10^6N

Fg=

M=2.75x10^6

Fnet-MA

F-Fg=ma

F-mg=ma

3.3x10^6-(2.75x10^6)(9.8)=2.75x10^6a

3.3x10^6-2.6x10^7=2.75x10^6a

-2.2x10^7=2.75x10^6a

-2.2x10^7/2.75x10^6=a

a=-8

The accual answer is 2.2m/s^2

Can someone explain to me what i got wrong?