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Think of situation when an obejct gets d...

Think of situation when an obejct gets displaced in the absence of a force acting on it.

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A puck on a horizontal air table (a frictionless table) : When an impulse is given to the puck it moves (gets displaced) with constant velocity in the absence of a force.
If we are in a moving train, we observe the trees, pillars, etc. Outside moving in opposite direction.
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