Which of the following is valid for displacement?
It can not be zero if an object has travelled some distance.
Its magnitude is always equal or greater than the distance travelled by an object.
It is a scalar quantity.
Its magnitude is equal to or less than the distance travelled by an object.
Its magnitude is equal to or less than the distance travelled by an object.
Displacement is the change in the position of an object. It has magnitude and direction.
Distance is the total movement of an object without any regard to direction.
It is the path length covered by the object
Explanation of correct option
Option D:
So, the magnitude of displacement is always less than or equal to the distance.
Option D is correct.
Explanation of incorrect options
Option A,
Since it is the change in position of an object, if an object travels a certain distance and then returns to its initial position, displacement will be zero.
Option A is incorrect
Option B,
The magnitude of displacement is always less than or equal to the distance.
Option B is incorrect.
Option C,
Displacement has both magnitude and direction; it is the change in the position of an object. So it is a vector quantity.
Option C is incorrect.