Friday

April 18, 2014

April 18, 2014

Posted by **sarah** on Friday, February 9, 2007 at 10:12pm.

I do know that thrust is the rate at which the exhust is expelled times the velocity of exhust... I am not even sure if this is relevent to this problem. Pleasee guide me into the right direction.

Also can you explain how I would set up this problem? I really appeciate the time you guys put inot answering these questions. Thanks in advance for your help.

Forcenet= mass*acceleration

but momentum down= massgas*velocitygas

momentum/time= massgas/time *velocity

forcegas= massgas/time*velocity

and force net= force gas- weightrocket

force net= massgas/time*velocitygas - massrocket*g

Finally,

massgas/time*velocitygas - massrocket*g= mass*acceleration

In the first case, acceleration is zero.

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