Recent content by pbumper1

I figured it out for future reference, since the rocket has to overcome 1g you add it to the 4g. You use the same equation. 4200x5x9.8/28=7400m/s

The answer is wrong and don't understand why it is?

Homework Statement A 4200kg rocket is to be accelerated at 4.0g at take-off from the Earth. If the gases can be ejected at a rate of 28 kg/s, what must be their exhaust speed? Homework Equations Fthrust=mv2-mv1/t2-t1 The Attempt at a Solution Multiplied 4200kgx4x9.8/28kg/s=-5900

R=6378.1+4500=R1 R=6378.1+13600=R2 R1=10878.1 R2=19978.1 U1=-6.6*10^-11x980x5.974*10^24/R1 =-3.59*10^13 U2=-" "/R2 =-1.96*10^13 got them both wrong v^2=6.6*10^-11x980/R1 plug v^2 to 1/2mv^2 i got 2.94*10^9 and 1.6*10^9 got them both wrong...

Homework Statement Two Earth satellites, A and B, each of mass each of 980kg, are launched into circular orbits around the Earth's center. Satellite A orbits at an altitude of 4500kg, and satellite B orbits at an altitude of 13600km. What are the potential energies of the two satellites...