Homework Help: Physics

Posted by Psuedia on Friday, October 8, 2010 at 2:30am.

a 2000kg rocket has a rocket motor thast generates 3.0 x 10^5 N of thrust.
What is the rockets initial upward acceleration ?
( I got 140ms^2)???? dont know if its right
and then it says
at an altitude of 5000m the rockets acceleration has increased to 6.0m/s^2. What is the mass of fuel has it burned ?

Physics - drwls, Friday, October 8, 2010 at 6:57am
The initial acceleration is F/M = 150 m/s^2.

An acceleration change TO 6.0 m/s^2 is not an increase in acceleration. Are you sure is did not increase BY 6.0 m/s^2, to 156 m/s^2?

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