Re: need help determined time to travel a path
- To: mathgroup at smc.vnet.net
- Subject: [mg107549] Re: [mg107512] need help determined time to travel a path
- From: Tomas Garza <tgarza10 at msn.com>
- Date: Tue, 16 Feb 2010 03:55:31 -0500 (EST)
- References: <201002151047.FAA28291@smc.vnet.net>
What is g? What is time0? Also, pi should be capitalized (pi). Tomas > Date: Mon, 15 Feb 2010 05:47:53 -0500 > From: brad2000 at gmail.com > Subject: [mg107512] need help determined time to travel a path > To: mathgroup at smc.vnet.net > > I am trying to determine the time to travel a circular path. This path is= on a > circle. It's fairly easy to understand. > > But, I can't seem to figure out why this is failing. > > (* define my parametrizations *) > circlex[t_]:=13+13*Sin[t+pi]; > circley[t_]:=13+13*Cos[t+pi]; > > (* the derivatives *) > dcirx[t_]:=D[circlex[t],t]; > dciry[t_]:=D[circley[t],t]; > > > (* amount of time needed to travel a circle *) > Integrate[Sqrt[(dcirx[t])^2+(dciry[t])^2]/Sqrt[2*g*(circley[time0]- > circley[t])], {t, 0.01, pi/2}] > > I get a negative value for the time. This can't be right.. > > Any help is much appreciated!! > > Thanks. > > Brad Walker >
- References:
- need help determined time to travel a path
- From: "bwalker@musings.com" <brad2000@gmail.com>
- need help determined time to travel a path