A shelf stocker lifts a 7.5-kg carton from the floor to a height of 0.70 m, carries it 45 m at constant speed across the store and places it on a shelf 1.5 m above the floor. How much work does the worker do on the carton?

the answer would be c. motion and direction

i hope this : )

none, its a machine

scientific laws are the result of testing theories and proving them to be facts.

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