गतिज ऊर्जा और स्थितिज ऊर्जा को मिलाकर किस रूप की ऊर्जा कहा जाता है?

How is work defined in physics?

It is easier to roll a stone uphill on a sloped road than to lift it vertically upward because:

The gravitational potential energy of an object at a height is the work done to lift it from the ground to that height _____________.