Question

A particles is moving in a circular path of radius . whar would the displacement be after half a circle?

Answer 1

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the diameter of the circle is its displacement in half of the circle 
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Answer 2

Circumference of circle is 2πr

Circumference of semicircle or half circle is 2πr/2 = πr

Therefore, displacement(shortest distance between both points) is the diameter of the circle,which is twice the radius
Hence,the particle now is at displacement of magnitude of 2r from the initial point.




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