So there's this person building a staircase who needs to be served as well. One of the workers runs up a plate to the guy who is at the top of the staircase, going step by step up. It takes far longer for that plate to get there and back again than for someone in the main dining hall, and then it might not even get washed. And the staircase keeps increasing in length, but the guy on the staircase still needs to get served, so it takes longer and longer and the person doing the plate-running starts to get very tired out.
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So there's this person building a staircase who needs to be served as well. One of the workers runs up a plate to the guy who is at the top of the staircase, going step by step up. It takes far longer for that plate to get there and back again than for someone in the main dining hall, and then it might not even get washed. And the staircase keeps increasing in length, but the guy on the staircase still needs to get served, so it takes longer and longer and the person doing the plate-running starts to get very tired out.
This is a situation for a bucket on a pulley.