A particle at rest leaves the origin with its velocity increasing with time according to vi(t)...

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A particle at rest leaves the origin with its velocity increasing with time according to vi(t) = 3t m/s. At 7s, the particles velocity starts decreasing according to v2(t) = 21 - 1.3(t - 7) m/s. The decrease continues until t = 11s, after which the particle's velocity remains constant at v3(t) = 15.8 m/s. Help on how to format answers: units (a) What is the acceleration of the particle as a function of time? 0 A particle at rest leaves the origin with its velocity increasing with time according to vi(t) = 3t m/s. At 7s, the particles velocity starts decreasing according to v2(t) = 21 - 1.3(t - 7) m/s. The decrease continues until t = 11s, after which the particle's velocity remains constant at v3(t) = 15.8 m/s. Help on how to format answers: units (a) What is the acceleration of the particle as a function of time? 0