Question: A car on a circular track accelerates from rest. (a) The car experiences (1) only angular acceleration, (2) only centripetal acceleration, (3) both angular and

A car on a circular track accelerates from rest.
(a) The car experiences (1) only angular acceleration, (2) only centripetal acceleration, (3) both angular and centripetal accelerations. Why?
(b) If the radius of the track is 0.30 km and the magnitude of the constant angular acceleration is 4.5 x 10–3 rad/s2, how long does the car take to make one lap around the track?
(c) What is the total (vector) acceleration of the car when it has completed half of a lap?

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