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Q.

In one second a particle goes from a point A to another point B moving in a semi circle of radius one meter as shown in the figure. The average speed

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a

1 {ms}^{- 1}

b

2 {ms}^{- 1}

c

3.14 {ms}^{- 1}

d

0 {ms}^{- 1}

answer is A.

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Detailed Solution

Radius (R) = 1m, time = 1s

Distance travelled in semicircle $(s) = π R \Rightarrow v = \frac{s}{t} = \frac{π R}{1} = \frac{3.14 \times 1}{1} = 3.14$

$v = 3.14 {ms}^{- 1}$

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