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The equation for the position of a particle for time (t>0) is given below.
7= (3.0tî – 1.0t°)m
What is the particle's acceleration when t=7.0 s?
O (3.07 – 12.0) m.s-2
O (- 42.0) m.s-2
O (-9.0) m.s?
O (3.07 - 6.0) m.s2
O (- 30.07) m.s-2

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