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What is the rocket's maximum altitude?

Im so lost if someone can please help me it would be so awesome

- Thread starter sktgurl930
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- #1

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What is the rocket's maximum altitude?

Im so lost if someone can please help me it would be so awesome

- #2

LowlyPion

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The rocket requires 2 calculations.

What is the rocket's maximum altitude?

Im so lost if someone can please help me it would be so awesome

The first is to determine the speed and height it gets to during the rocket ignition phase.

Thereafter it is being slowed by gravity. Determine from the speed you calculated as a result of the rocket ignition how much higher it will go. Add the 2 distances together.

Here are some formulas to help you.

https://www.physicsforums.com/showpost.php?p=905663&postcount=2

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so with the displacement formula i put x= V*35.2+.5*33.67*T^2

and my answer was 62577.7152 m

- #5

LowlyPion

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Your first answer is incorrect. The height will be given simply by 1/2 a* t

so with the displacement formula i put x= V*35.2+.5*33.67*T^2

and my answer was 62577.7152 m

On the second part you have x from the Vf

(At max height vf will be = 0.)

x = (1185.184)

Then add the corrected value of the first part and you're done.

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DaveC426913

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- #7

LowlyPion

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Given the statement of the problem, with constant acceleration given, the rate of change of mass should not be a concern. The fuel is apparently expended as it enters the gravity only phase is all you apparently need to know.given. One must factor in changing mass and therefore acceleration.

If the statement of the problem indicated that initial acceleration was xxx and it maintained constant force, then I agree it would be a concern. But I don't read it that way. And since I read this as an introductory question, I think the simpler interpretation is the most likely.

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DaveC426913

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You're right. Upon re-reading, I see that the acceleration isGiven the statement of the problem, with constant acceleration given, the rate of change of mass should not be a concern. The fuel is apparently expended as it enters the gravity only phase is all you apparently need to know.

If the statement of the problem indicated that initial acceleration was xxx and it maintained constant force, then I agree it would be a concern. But I don't read it that way. And since I read this as an introductory question, I think the simpler interpretation is the most likely.

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