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The Position Vector of a Particle Is R(t)

Question 6

Multiple Choice

The position vector of a particle is r(t) . Find the requested vector.
-The acceleration at t = 2 for r(t) = ( 7t - 3 ) i + ( 10 - t) j + ( 2 - 3t) k

A) a( 2) = -144i - j + 4k
B) a( 2) = 144i + 4k
C) a( 2) = -144i + 4k
D) a( 2) = -36i + 4k

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