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AIIMS2008PhysicsMotion in One Dimension

The displacement time graph of a particle moving along a straight line is drawn below.

Options

  1. A( array c|c OP & PQ & QR - & 0 & + array )
  2. B( array c|c OP & PQ & QR + & 0 & + array )
  3. C( array c|c OP & PQ & QR + & 0 & - array )
  4. D( array c|c OP & PQ & QR - & 0 & - array )

Correct answer

C. ( array c|c OP & PQ & QR + & 0 & - array )

Step-by-step solution

Acceleration = d^2 x d t^2 For part O P , the acceleration is positive as the velocity is increasing. Slope is increasing. For part P Q , the acceleration is zero. Horizontal straight line shows that the velocity is zero. For part Q R , acceleration is negative. It is retarded motion. Velocity is decreasing as the slope decreases with time. Hence option (c) is correct.

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