If a weightlifter used 1,200 newtons of force to lift a barbell to a height of 2.5 meters in 3 seconds, how much work did he do? a. 500 j b. 1,000 j c. 3,000 j d. 3,600 j

i don't understand. explain it clearly

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach