Question

an object moving in a circular path of radius 'r'.. what will be its displacement after it completes two amd a half rotation?​

Answer 1

Answer:

Displacement is the shortest distance travelled from the initial point to the final point. After half revolution the displacement is the length of the diameter which is equal to 2r. Hence the displacement is 2r.

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Answer 2

Answer:

      2r

Explanation:

displacement = shortest distance between initial and final point

after two complete rounds displacement is 0 as the object returns to its initial position.

after a further rotation of half the circle the object ends up in a position which is diametrically opposite to the initial position

∴ displacement = diameter = 2×radius = 2r