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A particle moves according to the law $\large x\, = \,a\cos \frac{{\pi t}}{2}$ . The distance covered by it in the time interval between t = 0 to t = 3 sec is

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4 a

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detailed solution

Correct option is B

0 to 1 sec a ; 1 to 2 sec a 2 to 3 sec a ; so, total distance = 3a

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A particle moves according to the law . The distance covered by it in the time interval between t = 0 to t = 3 sec is

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A particle moves according to the law $\large x\, = \,a\cos \frac{{\pi t}}{2}$ . The distance covered by it in the time interval between t = 0 to t = 3 sec is