Recent content by Hannibal123

Homework Statement I have these vectorfields defined on the specified set. All of them are conservative on their set. Also i have three unit circles C1, C2 and C3 centered respectively on (0,0) , (-2,0) and (-1,0) I need to find the line integrals over all of them on H (beregn = calculate...

Ok thanks. I have made an experiment where i have measured the wind force on an object (a water rocket) at different wind speeds. Plotted into a graph it gives me these values: http://imgur.com/He0Qd Which must be quadratic drag Or the same values but the with the velocity squared on the...

Thank you. But can the constant in linear drag be descirbed by som factors similar to the constant in qudratic drag? except for sferes moving in fluids...

Homework Statement What is the difference between the two proportionality constants for liner drag F=b*v and quadratic drag F=k*v^2 considering a general object moving trough air? i know that k is given by 1/2*ρ*C_w*A where C_w is the drag coefficient

Just found the correct place equation i think http://imgur.com/quiLu can you see a good way to shoten it?

Indeed it should, however it doesn't. Is this a wrong integration of the velocity equation? http://imgur.com/A6BKT Based on the gaph it does not seem to be correct.

this is the equation of place (if that is the correct term in english) as far as I am concerned the height is not suposed to be negative to positive time values? http://imgur.com/CxAYC

Turns out i did make some input mistakes, this looks better http://imgur.com/eVRwQ EDIT* Nope wrong again, this should be the correct equation http://imgur.com/bJ19e

Furthermore when i integrate the velocity equation i get this http://imgur.com/IO6G6 Again not sure if I am correct

that is what i meant. I doubt the results because when i draw them in a graph they doesn't seem to be correct. I have drawn them i geogebra if you are familiar with that software. My values are: m: 0,145 kg k: 0,0032 g: (gravity acceleration) 9,82 v_0: 9,93 m/s this is what i have...

Homework Statement the forces will be like this m⋅dv/dt=-m⋅g-k⋅v I need to find the velocity equation and the place equation, thereby meaning the integral of the velocity equation. for the condition t,v=0,v_0 The Attempt at a Solution i have found this...

I have solved it now thanks. http://imgur.com/E4SbR

Homework Statement I have some trouble integrating this velocity equation http://imgur.com/Ope9R The Attempt at a Solution i have tried myself and have come to this equation after solving for c for the condition t,s=0,s_0 however it is fine if the condition is t,s=0,0...

I am familiar with diff equations of first order. However i can't see what kind it is?

I don't really follow you there, would you mind elaborating that?