In the given figure, \( a=15 \mathrm{~m} / \mathrm{s}^{2} \) repres...

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In the given figure, \( a=15 \mathrm{~m} / \mathrm{s}^{2} \) represents the total acceleration of a particle moving in the clockwise direction in a circle of radius \( \mathrm{R}=2.5 \mathrm{~m} \) at a given instant of time. The speed of the particle is
(A) \( 6.2 \mathrm{~m} / \mathrm{s} \)
(B) \( 4.5 \mathrm{~m} / \mathrm{s} \)
(C) \( 5.0 \mathrm{~m} / \mathrm{s} \)
(D) \( 5.7 \mathrm{~m} / \mathrm{s} \)
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