From: tjoberts137@sbcglobal.net   
      
   On 10/28/23 1:02 PM, Luigi Fortunati wrote:   
   > George Hrabovsky il 26/10/2023 11:12:16 ha scritto:   
   >>> Yes, that's right, inertia is that property of bodies that makes   
   >>> them go straight at uniform speed.   
   >> No, inertia is the ability of a body to resist being accelerated.   
   >> Its quantity is what we think of as inertial mass. It is a scalar.   
      
   Actually, inertia does both -- it resists acceleration when a force is   
   applied, and it makes an object move in a uniform straight line when no   
   force is impressed on the object.   
      
   > If inertia is the ability of bodies to resist acceleration (which is   
   > a vector), then it cannot be a scalar!   
      
   No. When a force is impressed upon a massive object, the object's   
   inertia resists in the opposite direction. So inertial CANNOT be a   
   vector if it is to act the same for all forces in all directions. Indeed   
   "inertia" is really another name for "mass", which is clearly a scalar.   
      
   Tom Roberts   
      
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