Monday, October 13, 2014

What causes gravity?


What causes gravity? Why is there attraction between masses? Is it due to time or space distortion?




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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 \...