Respuesta :

Parrain

Answer:

There are quite a number of units to measure speed and depending on how fast an object is going, some are more preferred than others.

The units are:

  • Metres per second - this is on of the most common units and is regularly used by runners.  
  • Kilometres per hour - used by cars, buses and generally objects that move adequately fast.  
  • Miles per hour - this is a substitute to kilometers per hour for countries using the imperial system or miles instead of kilometers.  
  • Knots - Represent nautical miles and are a unit of speed mostly used to measure wind and water speed.
  • Feet per second - Not as popular but used in countries that don't regularly use metres.  
  • Mach number - for really fast objects going faster than sound.

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