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brake4country

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## Homework Statement

A rocket with a mass of 7.2 x 10^4 kg starts from rest in outer space and fires its thrusters until it is moving with a velocity of 100 m/s. What was the average force on the rocket due to the thrusters?

## Homework Equations

1/2 mv^2 = Fxd

## The Attempt at a Solution

I attempted this problem using conservation. However, I keep getting an answer with "d" yet I am unable to solve for d. Can anyone point me in the right direction?