I'm trying to solve a problem which involves the following scenario. Any help would be great!(adsbygoogle = window.adsbygoogle || []).push({});

A landing aircraft (mass 14 tonnes) is to be slowed from 300km/hr to 180km/hr in 3 seconds, by the deployment of two identical parachutes at its rear. Determine the diameter of each parachute. The landing is done at sea level in standard conditions.

So far:

- Drag coefficient of the parachute is 1.2

- Density of air is 1.23kg/m^3

- 300km/hr = 83.3 m/s

- 180km/hr = 50 m/s

F = M.A

F = 14000 * (83.3-50)/3

F = 15400 N

What I'm unsure of is what to use as V in the drag coefficient equation. I assume this requires me to integrate, but I'm not exactly sure what to integrate.

I'd really appreciate any help offered!

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# Homework Help: Parachute Drag

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