जब कोई वस्तु पृथ्वी की ओर स्वतंत्र रूप से गिरती है, तो उसकी कुल ऊर्जा:

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 _____________.