일반물리학 1 — Rotation: Problem 22

22 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 \( c = 1.00 \text{ m/s}^3 \). At \( t = 2.00 \text{ s} \), what is the angle between his (total) acceleration vector and his radial acceleration vector?