Question

A body moves in a circle of radius ‘2R’. What is the distance and displacement covered by the body after 2 complete rounds? (a) 0, 8 (b) 8 , 0 (c) 8 , 8 (d) 0, 0​

Answer 1

Answer:

8πr

Explanation:

Again, in this motion the initial and final positions are same

So, displacement t = final position - initial position = 0

Here, radius of circle =2r So, circumference =2n×2r=4πr

Now, since the body completes 2 rounds, so total distance travelled

=2×circumference=2×47πr=8πr.

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Answer 2

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Again, in this motion the initial and final positions are same

So, displacement ,

= final position - initial position = 0

Here, radius of circle 2r

So, Circumference = 2n × 2r = 4πr

Now , since body completes 2 rounds , so total distance travelled = 2 × Circumference = 2 × 47πr = 8πr .

(8,0)