A100 n force is applied to move a 15 kg object a horizontal distance of 5 meters at constant speed. * a 15 j
b 150 j
c 1500 j
d 15000 j

Although this question doesn't ask a question, I'm guessing that the
question is probably "How much work is done in moving the object ?"

If my hunch is correct, then the answer is not listed among the choices.

Work = (force) x (distance)

         = (100 N) x  (5 m)  =  500 joules.

Well whaddaya know!  Maybe that wasn't the question.