In which of the following situations is the most work done on the object? a. holding a 50 kg object. b.carrying a 30 kg object down a 40 m long hallway. c.lifting a 20 kg object 1 m up. d.carrying a 15 kg object upstairs from the first to the second floor. e.lowering a 25 kg object from a second story balcony to the ground

D.)Carrying a 15 kg object upstairs from the first to the second floor.

Explanation:

Work is simply defined as the ability to move an object a distance, which gives it the formula;

Work= Force × Distance

Force= mass × acceleration

More work is therefore done in lifting the 15kg from the first floor to the second floor, what also adds to the work done is walking with the load through the stair case. Most definitely option D

the answer is b i think