Need help for a stunt

cmoss

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What diameter must a circle be that is falling toward the earth at sea level, in order to hit the ground at 80 mph. if the circle weighs 600 pounds
This is a wind resistance calculation
 
What diameter must a circle be that is falling toward the earth at sea level, in order to hit the ground at 80 mph. if the circle weighs 600 pounds
This is a wind resistance calculation
Is the "circle" a disc or a sphere? Or a ring? What wind-resistance formula or algorithm have you been given to use? How far have you gotten in applying it?

Please be complete, including the definitions for each of the variables in the formula or algorithm. Thank you! ;)
 
Is the "circle" a disc or a sphere? Or a ring? What wind-resistance formula or algorithm have you been given to use? How far have you gotten in applying it?

Please be complete, including the definitions for each of the variables in the formula or algorithm. Thank you! ;)

It will be a sphere. I do not have an algorithm or formula. The idea is that a ball will be dropping from space with a diameter of 30 meters. Weighing around 700lbs

It is a ball falling from space. Needing to land on the ground at 80mph looking at a ball with a diameter of 30 meters
 
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I do not have an algorithm or formula.
Okay. Then what have you been studying recently? Was this exercise generated by a differential-equations class, a physics course, or something else? How "real life" is your solution expected to be?

The idea is that a ball will be dropping from space with a diameter of 30 meters.
"From space"? Really? Are you supposed to be taking erosion due to atmospheric heating into account? What is the material of the sphere?

Weighing around 700lbs. Needing to land on the ground at 80mph
What is "terminal velocity" for a sphere? Let's start there, to see if any propellants might be needed. By the way, how is your project supposed to get the sphere into space? What other information have you been given for this homework project?

When you reply, please be complete, including a clear listing of your efforts so far. If this is a group project, please include the inputs of the other group members. Thank you! ;)
 
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