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Velocity from using only weight mass and kilogram force?

  1. Apr 20, 2013 #1
    i was wondering about counting velocity only from weight mass and from kilogram force (like force from rocket thruster)

    ex: there's a rocket in space, its weight is 63 metric tons and the rocket thruster output is 128 tons. i won't include the G force, cause i wanna look the velocity when it's in space.

    is there a formula to count velocity from that kind of category? of course the velocity would be km/h

    to make it simple for the kilogram force, i try to convert 128 tons force to newton, which is 125,5251.2 newton
  2. jcsd
  3. Apr 20, 2013 #2


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    F = ma everywhere
  4. Apr 20, 2013 #3
    um, can you explain...?

    i'm a little idiot to physics, so can you please explain step by step how can get that formula to fit the description above...?
  5. Apr 20, 2013 #4


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    Force in Newtons, Mass in kilograms and acceleration in metres per second squared.
    The velocity will depend on how long the force has been applied. V = at

    BTW kilogram or a tonne is not a force. A force is measured in Newtons in SI units.
    What do you actually want to know and what do you mean by "count velocity"?
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