Physics-
General
Easy

Question

Figure shows the graphical variation of displacement with time for the case of a particle moving along a straight line. The accelerations of the particle during the intervals O A comma A B comma B C and C D are respectively

  1. O A A B B C C D    
  2. minus 0 + 0    
  3. + 0 + +    
  4. minus 0 minus 0    

The correct answer is: O A A B B C C D


    The portion O A of the graphs is convex upward. It represents negative acceleration. The portion A B represents negative acceleration. The portion A B represents that x is not changing with time. Clearly, it is a case of zero acceleration. The portion B C of the graph is concave upward. It represents positive acceleration. The portion C D is a straight line sloping upward to the right. It represents uniform velocity and hence acceleration is zero

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