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Question

Question 1
A particle is moving in a circular path of radius r. The displacement after half a circle would be:
(a) Zero
(b) πr
(c) 2r
(d) 2πr

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Solution

Given, radius of the circular path is 'r'.
Displacement is the shortest distance between the initial and final position of the particle.
Since the particle moves half a circle, the displacement = diameter of the circle = 2r

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