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.

"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. When do I need to
change the battery?

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!

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.

Bill wrote:
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. When do I need to
change the battery?

Change the battery when it runs down to the point that your photons &
flashlight are only moving apart at about 90% of C grin.

On Mon, 15 Oct 2007 07:49:45 -0700, toad
wrote:

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.

Of course not. It will continue to acquire kinetic energy at the same
rate, so many foot pounds per second. It will mostly get heavier
rather than going faster My 'calculator that takes no prisoners',
[HP48] will do the calculations for E=MC^2. Without a calculation I
will say that it would take a long time to double the mass, but there
is no upper limit if you have the source of power.

Casady