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What Does See-saw Mean?

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Rajesh Shri answered
See-saw is a popular playground apparatus consisting of a plank balanced in the middle with two children seated at opposite ends of the plank and alternately moving up and down. The back and forth or up and down movement is described as a see saw movement; a see-saw works on the principle of lever. A game of see saw is better enjoyed when both children are approximately of the same weight.

The term see-saw is used in various contexts, for example it is used in cases when a person is unable to take a decision or keeps changing his decisions or opinions; the verb to seesaw is used in this context without an object. The term seesaw is also used in theoretical physics in the quantum field theory; in the grand unification theory the seesaw mechanism is used in the explanation of masses of sub atomic particles like neutrinos.

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