किसी वस्तु पर किया गया कार्य तब शून्य होता है जब लगाए गए बल और विस्थापन के बीच का कोण होता 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 _____________.