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My project is a study of the center of gravity.

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The center of gravity is the imaginary point where the gravity of the whole body acts.

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It can be inside or outside the body.

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The center of gravity is closely related to the stability and the balance of the bodies

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and depends on the base of support.

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If the gravity line falls into the base of support, the body is stable.

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but if the gravity line falls out of the base of support, the body falls off.

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In the human body, the center of gravity moves at the same time that we move,

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being able to be outside the body in certain positions.

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This is very important for athletes.

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In gymnastics, for example, balance and stability are very important.

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The larger the base of support and the lower the center of gravity,

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the body is more stable and the change of direction improves. In contact sports, stability

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is very important so that the rival does not knock you down.

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Your center of gravity is here, so if you move it would move, like this, like this,

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it always moves. And if you are straight, if someone pushes you, you will fall down

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because you won't have very much stability.

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So if you separate your feet and bend your knees,

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if someone pushes you, you won't fall down

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because your center of gravity is lower and you will have better stability.

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In each sport, the center of gravity is used differently.

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The gymnasts are very sure to have the center of gravity very low

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very low and to be very stable. In high jump the athletes are very tall and with

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legs very long to be able to take out the center of gravity outside the body.

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For example, the first booty flop. For this experiment we will try to get a needle

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vertical by putting weights in its lower part. We will use a needle, a foam rubber ball,

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8 pom-poms and 2 chopsticks.

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Now we finish. We cut our bottom with the needle and the 2 chopsticks with the 4 pom-poms each one.

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We are going to see if it stands.

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It stands because the center of gravity is lower than the base of support and the stability is better.

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It always stands.

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Thank you.