Wednesday
April 16, 2014

Homework Help: physics

Posted by beavis on Wednesday, February 15, 2012 at 5:04pm.

(ignore the other question i posted this is the right one)
A rocket has a pre-ignition mass of 1100kg. On ignition it burns fuel at rate of 20kg s-1 producing a thrust of 10000N. How long after ignition of the fuel, will the rocket lift off?
also explain how is it possible for a rocket to accelerate in space.
(i cant work it outt. i know it involves the rocket thrust equation some how, the newtons 2nd law and suvat's..) thank you

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