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Starting from rest at time t = 0, a circ...

Starting from rest at time t = 0, a circus stunt man drives a motorbike on a horizontal circular track of radius 10.0 m. His speed is given by `v=ct^(2)`, where `c=1.00m//s^(3)`. At t = 2.00 s, what is the angle between his (total) acceleration vector and his radial acceleration vector?

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`alpha=tan^(-1)(2.50)=68.2^(@)`
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