At launch, the space shuttle’s engines develop 3.0 * 10^7 N of thrust. If the speed of the exhaust gasses is 15 km/s, what mass of gas is exhausted per second?(adsbygoogle = window.adsbygoogle || []).push({});

[tex]

F=ma\Rightarrow m=\frac{F}{a}

[/tex]

[tex]

kg=\frac{kg\cdot m/s^2}{m/s^2}

[/tex]

[tex]

kg=\frac{kg\cdot m/s^{\rlap{--} {2}}}{m/s^{\rlap{--} {2}}}\Rightarrow

m=\frac{3.0\cdot 10^7kg\cdot \rlap{--} {m}/\rlap{--} {s}}{15(\rlap{--}

{k}\rlap{--} {m}/\rlap{--} {s})\ast 1000\rlap{--} {m}/\rlap{--} {k}\rlap{--}

{m}}

[/tex]

[tex]

m=2000kg

[/tex]

I'm not sure if I'm allowed to cancel out the squared part of s squared, and still associate the 3.0e7 N with units that no longer represent it. Is my answer even correct?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Thrust question

**Physics Forums | Science Articles, Homework Help, Discussion**