Thursday, August 18, 2016

gravity - All matter has a mass but does all matter have a gravitational pull?


I know that all planets and stars have a gravitational pull but does a simple much smaller object have a gravitational pull for example a pebble?




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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 \...