Rocket Acceleration: Linear or Exponential?

[galaticman]

Homework Statement

Do rockets have linear or exponential acceleration?

The Attempt at a Solution

This is not a homework question I was just wondering if Rockets have linear or exponential acceleration. I was thinking that they have exponential acceleration because of the constant loss of mass due to the exhausted fuel, which in turn makes the rocket lighter and increases its acceleration exponentially. I am not sure if this is correct or not. Please help!

EDIT: Say that this is a rocket in deep space where gravity from another body is zero, and the rocket starts from rest.

 

[Filip Larsen]

You may find it useful to read about the rocket equation [1].[1] http://en.wikipedia.org/wiki/Tsiolkovsky_rocket_equation