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  • A particle is moving in a circular path of radius r. The displacement after half a circle would be: (a) Zero

A particle is moving in a circular path of radius r. The displacement after half a circle would be:

(a) Zero

(b) \pi r

(c) 2 r

(d) 2 \pi r

Answers (1)

Ans. C

Sol.

Displacement is the direct separation length from initial point to final point.

Distance is the total path length travelled by the particle.

As the particle covers half circle it will reach at diametrically opposite point.

If someone ask, what is the distance travelled, answer will be half of Perimeter.

But displacement will be the direct separation between these two diametric points and it would be equal to Diameter.

Hence the correct answer is C which is 2r.

Posted by

infoexpert21

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