Wednesday, May 14, 2014

newtonian mechanics - What is the fastest a spacecraft can get using gravity-assist?



Assuming normal spacecraft and space objects (no neutron stars, black holes, etc). To what speed can a spacecraft accelerate using gravity-assist?


For example, if a spacecraft is moving at relativistic speeds, it probably won't get seriously sped up by normal-density objects.




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classical mechanics - Moment of a force about a given axis (Torque) - Scalar or vectorial?

I am studying Statics and saw that: The moment of a force about a given axis (or Torque) is defined by the equation: $M_X = (\vec r \times \...