• In this case, conservation of energy can be used because no energy is lost to friction. The static friction force is actually what causes the object to rotate, so the energy is conserved as rotational kinetic energy

Explanation:

let it be I'm not getting my own doubt..

I'm just thinking when it falls height h(in inclined plane)and is at ground it should have no KE as h=0 and there's no potential energy which will get convert into KE