Re: Question about work and friction
- From: Dwib <dwibdwib@xxxxxxxxx>
- Date: Sun, 30 Dec 2007 18:53:57 -0800 (PST)
On Dec 30, 7:29�pm, "Robert" <rob...@xxxxxxxxxxxxxxxx> wrote:
Question: A waiter carries a tray full of meals across the room. Is work
being done?
Arms and arm muscles are not cables and pulleys. These tiny muscle
cells are constantly twitching and that uses energy.
Dwib
.
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- From: Robert
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