Saturday, April 13, 2019

optics - Why does one get an illusion as moon following him?


When you run or ride bike at night if you observe the moon you feel like he moves along with you as the same speed you are going. Why?




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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 \...