- #1
sigma
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Hi! I've written a simple software to calculate projectile trajectories when air resistane can't be neglected. I'm planning to test the software with a light ball and a cannon.
My model simply say
F = -k * A * v^2
The force of drag F is proportional to the velocity v squared. k and A are constant of drag and frontal area respectively.
Can anyone tell me what the constant k would be for a sphere?
The ball I'm planning to use is about 2.5 cm in diameter, weighs about 5 g (guess) and is pretty smooth. It will be launched at speeds of about 5 - 7 m/s.
If the information is insufficient, please ask.
Edit: Please use SI units, thanks!
//Sigma
My model simply say
F = -k * A * v^2
The force of drag F is proportional to the velocity v squared. k and A are constant of drag and frontal area respectively.
Can anyone tell me what the constant k would be for a sphere?
The ball I'm planning to use is about 2.5 cm in diameter, weighs about 5 g (guess) and is pretty smooth. It will be launched at speeds of about 5 - 7 m/s.
If the information is insufficient, please ask.
Edit: Please use SI units, thanks!
//Sigma