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這個"聖誕號”是滿載歡欣的快樂小船。聖誕節是一個普世歡騰的日子,家人、朋友都會聚在一起一齊歡度佳節,是一個最有氣氛嘅節日。每當聖誕節來臨,大街上有閃爍的五顏六色燈光的聖誕樹,十分熱鬧,所以我想"聖誕號”把所有歡樂隨着小船運載出去。
而且所有材料都是平時做手工餘下的材料,這樣就不浪費做到環保回收,又可設計獨一無二的漂流小船。
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by: Tanya Yeung
A parachute is a device used to slow objects falling toward the ground.
There are two forces acting on a falling person
Here gravity is greater than air resistance
When the parachute opens, air resistance increases
Air resistance is greater than gravity
Finally, the speed of the parachute slows down, and the person can safely land on the ground
Air Resistance Air Resistance: The frictional force of air on a moving object
Surface Area total face value: Surface area is the sum of the areas of all sides of an object
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