FR Bending of Light -- Proof
in [Physics]
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From: Phil Bouchard on 27 Jan 2010 13:54 Sam Wormley wrote: > > You are incredibly naive, Phil! Take a freshman physics class. If v = m/s and s is reduced then v will increase. If v increases then E = 1/2mv^2 will increase as well.
From: Androcles on 27 Jan 2010 14:15 "Phil Bouchard" <phil(a)fornux.com> wrote in message news:4b608c09(a)news.x-privat.org... > Sam Wormley wrote: >> >> You are incredibly naive, Phil! Take a freshman physics class. > > If v = m/s and s is reduced then v will increase. If v increases then E = > 1/2mv^2 will increase as well. Very logical. And since v is relative then energy must be relative too. How much potential energy does a rock have if it is on the floor above you? How much potential energy does a rock have if it is two floors above you? How much potential energy does a rock have if it is on the floor below you?
From: Phil Bouchard on 27 Jan 2010 14:35 Androcles wrote: > > Very logical. And since v is relative then energy must be relative too. > How much potential energy does a rock have if it is on the floor above > you? PE = m_rock * g * h_floor > How much potential energy does a rock have if it is two floors above > you? PE = m_rock * g * h_floor * 2 > How much potential energy does a rock have if it is on the floor below > you? PE = m_rock * g * - h_floor
From: Androcles on 27 Jan 2010 14:43 "Phil Bouchard" <phil(a)fornux.com> wrote in message news:4b609581$1(a)news.x-privat.org... > Androcles wrote: >> >> Very logical. And since v is relative then energy must be relative too. >> How much potential energy does a rock have if it is on the floor above >> you? > > PE = m_rock * g * h_floor > >> How much potential energy does a rock have if it is two floors above >> you? > > PE = m_rock * g * h_floor * 2 > >> How much potential energy does a rock have if it is on the floor below >> you? > > PE = m_rock * g * - h_floor Ok, so PE can be negative. Now the rock falls and the PE is converted to KE. What is the KE of 1/2 m_rock * v^2 when v is negative?
From: Phil Bouchard on 27 Jan 2010 14:53
Androcles wrote: > > Ok, so PE can be negative. > Now the rock falls and the PE is converted to KE. > > What is the KE of 1/2 m_rock * v^2 when v is negative? KE = 1/2 m_rock * v^2 KE will always be positive. |