A simple problem

*To*: mathgroup at smc.vnet.net*Subject*: [mg25786] A simple problem*From*: "Paul Lutus" <nospam at nosite.com>*Date*: Wed, 25 Oct 2000 03:53:45 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

I have a very simple notation problem I cannot solve (because of my limited knowledge of Mathematica). Example -- an equation from physics: f := a * t^2 / 2 - p == 0 Now I want to create the different forms of this equation, such as: Solve[f,t] which produces: sqrt(2) * sqrt(p) / sqrt(a) Okay, the correct general solution. What I really wanted was the limited solution ( sqrt(2p/a) ). I know I need to say "assume all the variables are >= 0", but I can't figure out how to express this. I've tried applying a number of different constraints without success. Hey -- I warned you. Simple problem. :) -- Paul Lutus www.arachnoid.com