Recent content by Juhannuskokko

  1. J

    Rocket Specific Impulse vs Jet Engine Specific Impulse

    I really can't seem to wrap my head around why the specific impulse on a rocket is so much lower than that on a jet. I know a jet engine has a larger supply of oxygen, but I don't see why that has such a huge effect. I also know exhaust velocity plays a large part, but I would have thought that...
  2. J

    How can constant power produce constant acceleration?

    Good point, I got confused, I was thinking of power = force*velocity, where it can be a part of the equation, the force is the resultant force, so it's the forward thrust minus the resistive force.
  3. J

    How can constant power produce constant acceleration?

    The way I see it, a constant supply of power, say from the engine in a car to its wheels, will cause it to accelerate at a decreasing rate because the kinetic energy the power supplies is proportional to the velocity squared. That makes sense because going faster will cause the car to encounter...
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