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In 1.0 s, a particle goes from point A to point B, moving in a semicircle of radius 1.0 m (see Figure). The magnitude of the average velocity is [add image]
Explanation
$| \text{Average velocity} | = \frac{| \text{displacement} |}{\text{time}} = 2r/t = 2 \times 1/1 = 2 m/s$