A regulation basketball has a 25.0-cm diameter and a mass of 0.560 kg. It may be approximated as a thin spherical shell with a moment of inertia.

A regulation basketball has a 25.0-cm diameter and a mass of 0.560 kg. It may be approximated as a thin spherical shell with a moment of inertia. Starting from rest, how long will it take a basketball to roll without slipping 4.00 m down an incline at 30.0°to the horizontal? (Give your answer with three significant figures)