Question

Pablo preto lift a barbell. During which stage of the lift does Pablo do work on the barbell

Answer 1

While he is lifting the dumbell as the definition of work done = moving a mass through a distance = F x d

Answer 2

this is the original question:

Pablo prepares to lift a barbell. During which stage of the lift does Pablo do work on the barbell?

when he holds the barbell up above his head

when he applies force to the barbell but has not moved it

when he lifts the barbell from the floor to his chest

when he lets go of the barbell and allows it fall to the ground

that is the answer-> when he lifts the barbell from the floor to his chest

hope this helps!