Question

Mr.wilinson carried his backpack 12kilometers and set up camp on the edge of cutthroat lake it took him 3 hours to get there from the trailhead how much work did he do on his backpack on the hike in?(1pound=453.7grams=4.1newtons)EXPAIN
keria
How much work is done when a 1 kilogram mass is raised a vertical distance of 1 meter?