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An aeroplane is heading north east at a speed of 141.4 m s to the power of negative 1 end exponent. The northward component of its velocity is

  1. 141.4 m s to the power of negative 1 end exponent    
  2. 100 space ms to the power of negative 1 end exponent    
  3. zero    
  4. 50 m s to the power of negative 1 end exponent    

The correct answer is: 100 space ms to the power of negative 1 end exponent

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