Physics-
General
Easy

Question

The variation of velocity of a particle with time moving along a straight line is illustrated in the following figure. The distance travelled by the particle in four seconds is

  1. 60 m    
  2. 55 m    
  3. 25 m    
  4. 30 m    

The correct answer is: 55 m


    Distance = Area under v ­– t graphequals A subscript 1 end subscript plus A subscript 2 end subscript plus A subscript 3 end subscript plus A subscript 4 end subscript

    equals fraction numerator 1 over denominator 2 end fraction cross times 1 cross times 20 plus left parenthesis 20 cross times 1 right parenthesis plus fraction numerator 1 over denominator 2 end fraction left parenthesis 20 plus 10 right parenthesis cross times 1 plus left parenthesis 10 cross times 1 right parenthesis
    equals 10 plus 20 plus 15 plus 10 equals 55   m

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