Lifting a heavy backpack from the floor to your shoulder., Work or No Work?, Standing still while holding a heavy backpack on your back., Work or No Work?, Pushing a wall as hard as you can until you sweat., Work or No Work?, A car rolling down a hill because of gravity., Work or No Work?, Carrying a tray of food across a cafeteria at a constant height., Work or No Work?, Pulling a wagon full of toys behind you for 10 meters., Work or No Work?, A weightlifter holding a 200kg bar steady above their head., Work or No Work?, Dropping a pencil and watching it fall to the ground., Work or No Work?, Trying to push a stuck drawer that won't open., Work or No Work?, Climbing a flight of stairs., Work or No Work?, An ice skater gliding across the ice after a single push., Work or No Work?, Throwing a bowling ball down the lane., Work or No Work?, Tugging on a rope in tug-of-war, but neither side moves., Work or No Work?, A moon orbiting the Earth in a perfect circle., Work or No Work?, Pushing a lawnmower across the grass., Work or No Work?

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