give an example to show that displacement can be negative?

Displacement is vector quantity which has magnitude as well as direction. Therefore, the negative displacement can be easily shown using a proper frame of reference. Suppose a motion starts from a point A. Here point A is our origin. Let us assume moving to right be a positive direction. This is our frame of reference.
Let a body starts to move from point A to point B 20m right and then B to C 30m left. Then, here A to C we have negative displacement of 10m.
Hope this helps,
Good luck.

  • 25

since displacement has both magnitude and direction

for eg a body moves 20 km north  and then 40 km south then the displasemet towards norh is likely to be -20km

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