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I wonder if anyone here might be able to help me. I am writing a children's book called The Wing Giver about a boy who wants to fly and a Spitfire pilot. However words are my thing and physics isn't!

In the book, the boy wants to solve a formula his dad has set him which is to work out the size of parachute he would need for himself - a 70kg male.

Somewhere during my research I found this formula (v(t) = sqrt(2*m*g/(p*A*(d) ) but I can't remember where from or what it is calculating exactly!

Does anyone have any suggestions for a good parachute formula that would stump a ten year old boy but one that he might have the possibility of working out over time.

Any ideas will be so gratefully appreciated and if I ever get published, I'll give you a thanks!!!

Emma

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# Parachute design help - children's book

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