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  4. Assertion: The magnitude of the displacement for a course of motion may be zero. Reason: The path length for the corresponding course of motion is zero.

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Q. Assertion : The magnitude of the displacement for a course of motion may be zero.
Reason : The path length for the corresponding course of motion is zero.

Motion in a Straight Line

Solution:

The magnitude of the displacement for a course of motion maybe zero but the corresponding path length is non-zero. For example, if a car starts from a point $ O $ , goes to a point $ P $ and then returns to $ O $ . The final position coincides with the initial position and the displacement is zero. The path length of this journey is $ OP + OP = 2OP $ .