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Seesaw

From Academic Kids

Seesaw with a crowd of children playing
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Seesaw with a crowd of children playing
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A set of playground seesaws
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Makeshift seesaw used for acrobatics
This article is about the playground equipment. For other meanings, see Seesaw (disambiguation).

A seesaw (also known as a teeter-totter) is a long, narrow board suspended in the middle so that, as one end goes up, the other goes down.

In a playground setting, the board is balanced in the exact center. A person sits on each end and they take turns pushing their feet against the ground to lift their end into the air. Playground seesaws usually have handles for the riders to grip as they sit facing each other. One problem with the see--saw's design is that if a heavier child allows herself to hit the ground suddenly after jumping, or exits the seesaw at the bottom, the lighter child may fall and be injured. For this reason, seesaws are often mounted above a soft surface such as foam or wood chips.

In dog agility, the board is off balance so that the same end always returns to the ground after the dog has run across it.

Seesaws are also used in acrobatics.

For the mechanics of a seesaw see lever. The simple mechanics of a seesaw mean that they appear frequently in school exam paper questions.nl:wipwapja:シーソー

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