General
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Physics-

The graph of displacement-time for a body travelling in a straight line is given. We can conclude that

Physics-General

  1. The velocity is constant    
  2. The velocity increases uniformly.    
  3. The body is subjected to acceleration from Oto A.    
  4. The velocity of the body at A is zero.    

    Answer:The correct answer is: The velocity of the body at A is zero.At the point A, the tangent to the curve is parallel to time axis. So, velocity at A is zero. But acceleration is not zero. Note that the displacement corresponding to the point A is not zero.

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    x equals 4 open parentheses t minus 2 close parentheses plus a open parentheses t minus 2 close parentheses to the power of 2 end exponent
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