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Re: [Phys-l] real-world mechanics problem



?BC,
Agreed, .5mv^2 = mgh .

But how do you turn X dot =SQRT(2gL[1-CosA])
into
X dot = sqrt.(g*L) A ?

-Bob

-----Original Message----- From: Bernard Cleyet
Sent: Friday, February 04, 2011 2:37 AM
To: Forum for Physics Educators
Cc: Nancy Seese
Subject: Re: [Phys-l] real-world mechanics problem

The g field is conservative, so path independent.

So wether the bob free falls or is frictionless constrained, its BDC speed will be the same for the same initial height w/speed zero, I pray to Lucifer.

bc just returned from UCSF's torture chair.



On 2011, Feb 03, , at 10:32, Bob Sciamanda wrote:

?BC,
I don't quite follow all of this, BUT
Why are you using the kinematics of CONSTANT ACCELERATION for a pendulum
bob?
-Bob (not a pendulum bob

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Bob Sciamanda
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