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The speed-time graph of an object is a straight line. Which of the following statements can be concluded? A- The motion of the object is a uniform motion B- The object is at rest C- The motion of the object is a non uniform motion. 

The speed-time graph of an object is a straight line. Which of the following statements can be concluded? A- The motion of the object is a uniform motion B- The object is at rest C- The motion of the object is a non uniform motion.  Correct Answer B or C 

Concept:

Motion:

  • A body is said to be in motion if its position changes continuously with respect to the surroundings with time.
  • The motion of an object could be uniform or non-uniform depending on whether its velocity is constant or changing.
  • Uniform and non-uniform motions of objects can be shown through graphs.
  • The speed of an object is the distance covered per unit of time.

Uniform Motion:

  • It is a motion in which a material point moves in a straight line at a uniform speed.

Non-uniform Motion:

  • It is a motion in which the velocity varies with time.

Explanation:

  • The change in the position of an object with time can be represented on the speed-time graph.
  • When the speed-time graph is a straight line parallel to the time axis then, the object is at rest and also moves at non-uniform speed.

​Key Points

  • In a distance-time graph, for uniform speed, a graph of distance traveled against time is a straight line and the motion of the object is uniform.

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