Q. 75.0( 2 Votes )

A body moves on three quarters of a circle of radius r. The displacement and distance travelled by it are:
A. displacement = r, distance = 3r

B. displacement =r, distance =

C. distance = 2r, displacement =

D. displacement = -, distance =

Answer :


From the diagram,


Circumference =


× Circumference =


=


Now,


Distance = Total path covered by the body


= × Circumference


= =


Whereas,


Displacement = Shortest Distance (Straight line) AB


=


=


= r


Hence, option B is correct.

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