A Saturn V rocket has a mass of 2.75 x 106 kg and exerts a force of 3.3 x 107 N on the gases it expels. Determine:(adsbygoogle = window.adsbygoogle || []).push({});

a) the initial vertical acceleration of the rocket

b) its velocity after 8 s

c) how long it takes to reach an altitude of 9500 m.

Ignore mass of gas expelled and assume g remains constant

a)Fnet=Fengine-Fgravity

Fengine=Fnet+Fgravity

Fengine=m(a+g)

a=F/m-g=(3.3*10^7 N/2.75*10^6 kg) - 9.8=2.2m/s^2

b) Not sure how to do

c) Not sure how to do

Any help?

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# Homework Help: Newton's Third Law and rocket

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