wrote in message
ups.com...
On 15 Oct, 17:46, "Bill" wrote:
"toad" wrote in message

ps.com...

On 15 Oct, 14:27, (Richard Casady) wrote:

Why wouldn't it accellerate indefinitely with no friction anywhere in
the system.

....because as it approaches the speed of light it will require
infinate energy.

My flashlight shoots out photons at the speed of light and it is powered
by
a 1 1/2 volt battery. Even better, my flashlight moves away from the
photons
at the speed of light with the same 1 1/2 volt battery.

If you are saying you flashlight moves at the speed of light relative
to you, I'm impressed. If your flashlight moves at the speed of light
relative to it's own output I'm less impressed!


My flashlight is not that impressive. If it gave off enough photons it could
move at the speed of light relative to me.