4.14 teachers and students discuss together from playing a glider and answer the questions at the end of the activity should be concluded whether the glider is a toy that can glide in the air, the lift force with the principle of the air to the wings of a glider. While the glider rises through the air. The movement of air at the top, there will be more speed at the bottom of the wing glider. Make the air pressure below the wing is greater than the air pressure on the wing glider. For this reason, it has to be adapted to. Gravity center position of the glider is located at the area of the trunk between the width of the wing. It will make the glider landed on the air for a long time
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