Question

The particles is moving in a uniform path of radius r , the distance after half circle would be ?
See that there is distance not displacement
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Answer 1

Answer:

The answer will be 2r.

After the particle covers half path of the circle, the displacement can be easily calculated by measuring the distance between initial and final points

Answer 2

Answer:

The displacement after half a circle would be. Given, aftar half the circle, the particle will reach the diametrically opposite opint i.e., from point A to point B. Hence, the displacement aftar half circle is 2r. ..