किसी वस्तु पर बल लगाने पर किया गया कार्य शून्य होगा यदि वस्तु का विस्थापन 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 _____________.