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A mechanical advantage less than ' 1 ' means the output force is less than the input force. But distance is gained ... the load moves farther than the driving force moves.
An example of all this is a big father and his little 4-year-old daughter playing on the see-saw in the park. He adjusts the board so that he's much closer to the pivot than she is, and that way, their weights can balance each other.
It's set up so that the mechanical advantage from him to her is less than ' 1 '. Now, look at what happens when Dad sits down on his end of the see-saw, and pushes it down with his 180 pounds of force. At the other end, the board is barely lifting her with a force of just 30 pounds. BUT ... as he sinks down only 1 foot against his end of the board, her end rises 6 feet off the ground.

Answered by AL2006 | 2024-06-10

A mechanical advantage of less than one means that the output force is smaller than the input force, which allows for a greater distance to be covered by the load than by the input force. This principle showcases the balance between force and distance in simple machines. An example is a seesaw, where a heavier person can raise a lighter person significantly even though their force is greater.
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Answered by AL2006 | 2024-12-24