- give a direct answer to my question
- maybe point me in the right direction as to where I should be looking for
the math or answer to my question
- tell me to go away as this is a serious group
The question is:
If I have an object such as an iron ball 3 inches in diameter, wiehging 1
kilogram that is propelled upwards at the speed of light (or close), from a
stationary position with the force of gravity acting against it. How long
should it take to reach it's maximum velocity (close to light speed). I hope
this makes sense.
"Mr Mint" <[Only registered users see links. ]> wrote in message
news:407d443c$0$6477$[Only registered users see links. ].news.easynet .net...
As long as you stay far away from c, you can always use Newton:
the relationship between velocity and acceleration
v=a * t + v0
the relationship between distance, velocity, and acceleration
s=1/2 * a * t^2 + v0 * t +s0
Since you have established that you are only interested in a differential
measurement, s0 can be zero.
If you want to work closer to c, you'll need to look at energies... a much
more complicated process. Especially when you consider that the moving
observer, and the stationary observer will not agree on the rate of speed.