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General
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Question

A car runs at a constant speed on a circular track of radius 100 m, taking 62.8 s for every circular lap. The average velocity and average speed for each circular lap respectively is

  1. 0,0  
  2. 0 comma blank 10 blank m s to the power of negative 1 end exponent  
  3. 10 blank m s to the power of negative 1 end exponent comma blank 10 blank m s to the power of negative 1 end exponent  
  4. 10 blank m s to the power of negative 1 end exponent comma blank 0  

The correct answer is: 0 comma blank 10 blank m s to the power of negative 1 end exponent


    On a circular path in completing one turn, the distance traveled is 2 pi r while displacement is zero.
    H e n c e comma blank a v e r a g e blank v e l o c i t y equals fraction numerator d i s p l a c e m e n t over denominator t i m e blank i n t e r v a l end fraction equals fraction numerator 0 over denominator t end fraction equals 0
    A v e r a g e blank s p e e d equals fraction numerator d i s t a n c e blank over denominator t i m e blank i n t e r v a l end fraction
    equals fraction numerator 2 pi r over denominator t end fraction equals fraction numerator 2 cross times 3.14 cross times 100 over denominator 62.8 end fraction equals 10 blank m s to the power of negative 1 end exponent

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