# Rocket propulsion

Psyguy22

## Homework Statement

A rocket in outer space has a payload of 4050.0 kg and 1.753·105 kg of fuel. The rocket can expel propellant at a speed of 4.300 km/s. Assume that the rocket starts from rest, accelerates to its final velocity, and then begins its trip. How long will it take the rocket to travel a distance of 3.82 ·105 km

## Homework Equations

[itex] V [sub c] ln(m [sub i]/ m [sub f])

## The Attempt at a Solution

Psyguy22
I found the final velocity, but when i tried to use the formula for distance, I found that I didn't have r sub p or T max and have no clue how to find them.

Homework Helper
Gold Member
You need to post all the equations you are referring to and define any symbols in them which might not be completely obvious to readers. (Even the "relevant equation" you posted is not an equation.)

Staff Emeritus