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Question

Velocity-time left parenthesis v-t right parenthesis graph for a moving object is shown in the figure. Total displacement of the object during the same interval when there is non-zero acceleration and retardation is

  1. 60 blank m    
  2. 50 blank m    
  3. 30 blank m    
  4. 40 blank m    

The correct answer is: 50 blank m


    Between time interval 20 blank s e c to 40 blank s e c, there is non-zero acceleration and retardation. Hence distance travelled during this interval
    equals Area between time interval 20 blank s e c to 40 blank s e c
    equals fraction numerator 1 over denominator 2 end fraction cross times 20 cross times 3 plus 20 cross times 1 equals 30 plus 20 equals 50 blank m

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