Rocks may form chemically when

Ineed extreme for task 2. my student number is 571721. many to whoever solves this correctly, im in debt to you.

Aball has an initial velocity of 3 m/s. if there is no friction, what is the highest it could roll?

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.