
#1
Sep105, 08:51 PM

P: 138

What acceleration does a rocket need to reach speed of 200 m/s at height of 1.0km. I know that acceleration is velocity over time but I have only velocity and distance.




#2
Sep105, 08:56 PM

HW Helper
P: 1,422

So how about the formula:
[tex]v_f ^ 2 = v_i ^ 2 + 2ad[/tex]? Do you know this formula? Can you go from there? Remember to change 1.0 km into 1000m. Viet Dao, 



#3
Sep105, 09:03 PM

P: 138

That is calculus. Would you mind telling me those variables.




#4
Sep105, 09:16 PM

HW Helper
P: 1,422

acceleration question
a : acceleration (m / s ^ 2) = ?.
d : displacement (m) = 1000 m. v_i : initial velocity (m / s) = 0 m / s (The object accelerates from rest). v_f : final velocity (m / s) = 200 m / s. Can you go from here? By the way, I think it is physics, not calculus... Viet Dao, 



#5
Sep105, 09:25 PM

P: 138

O thanks. I tried to look it up in some later chapters but found formulas involving derivations. I didn't know what those variables were so I guessed that you have to use calculus to find way to do it. Thanks for help.



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