Speed or Force?

• Call4ljw

  16 Jul 11, 17:55

  Hi!

  I would like to know that for vehicles(eg trains) is speed or force more important for:

  1)Startup acceleration(moving from speed 0)

  2)normal acceleration(already moving)

  And provide explanation if possible.

  thanks!

• Memorypriest

  18 Jul 11, 01:31

  It is the force that cause an object to accelerate.
  While the change in speed is acceleration.
  
  This question don't make sense.

• ^Acid^ aka s|aO^eH~

  18 Jul 11, 09:49

  Can rephrase ur question???

• Call4ljw

  19 Jul 11, 15:18

  Actually what I wanted to know the gear ratio used for different situations.(they are related since bigger>smaller gear = less MA = higher speed; smaller>bigger gear = more MA = lower speed)

   

  And what I wanted to know is related to vehicles, basically trains. So when a train from 0 speed moves off the station, what gear setting is used? while when a train accelerates (acceleration 0 to some amount; maybe 0m/s to 1m/s acceleration) when moving,(like a car moving at 50km/hr then step on gas to increase speed) what gear setting is used for optimized speed?