Recent content by klwong

  1. klwong

    I Moving Spacecraft propellent less?

    p=mv since speed is slower， during the backword process the final momenton of the black ball is smaller?
  2. klwong

    I Moving Spacecraft propellent less?

    What if during the reset process when the balls are moved forwards, we give the balls a speed much slower than 0.1m/s ?
  3. klwong

    I Moving Spacecraft propellent less?

  4. klwong

    I Moving Spacecraft propellent less?

    Assuming there are four robot inside a stationary spacecraft (mass 2 ton) , robot A has an electric gun that can shoot iron balls weighing 1kg at a speed of 8m/s. These balls collide with red balls at a 45-degree angle in a two-dimensional elastic collision. Each ball has a mass of 1kg. The red...