Can someone help me I’m in the middle of a test

The slope of a velocity time graph over any interval of time gives the during that interval

Astone weighing 1.5 kilograms is resting on a rock at a height of 20 meters above the ground. the stone rolls down 10 meters and comes to rest on a patch of moss. the gravitational potential energy of the stone on the moss is joules.

What is the moment of inertia i of this assembly about the axis through which it is pivoted? express the moment of inertia in terms of mr