pablo prepares to lift a barbell. during which stage of the lift does pablo do work on the barbell? when he…

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

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

Answer

Brief Explanations:

Work is done when a force causes an object to move in the direction of the force. When holding the barbell up, no displacement in the direction of the force occurs. When applying force without moving it, there is no displacement. When letting it fall, gravity does the work. Only when lifting it from the floor to the chest is force applied and displacement in the direction of the force happens.

Answer:

when he lifts the barbell from the floor to his chest