Monday, February 8, 2016

projectile - What decides the velocity of a bullet coming out from the gun?


I was concerned about what determines the speed of the bullet coming out from the gun.


Is it determined by the strength of the explosive or how fast does it burn up?


For example if we take the same amount of gun powder and a plastic explosive (probably TNT) in a bullet shell which bullet will go further the one with the plastic explosive or the one with the gun powder




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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 \...