A 136 N box is lifted a distance of 6 meters how much work is done. I believe that the formula is Work=Fd. So force is found by F=ma. However I think force in this is 136 so that would be 136*6=816N-m

You don't need to find force in this case. You have a 136 Newton box. The force is 136 Newtons. W = 136 *6 = 816 Newton-Meters

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