# How to calculate air resistance? [closed]

What is the best way to calculate or take into account air resistance? I have an assignment which goes as:

Drop an object by itself and with a parachute, calculate air resistance for the parachute. It is assumed the object itself has no air resistance

Im kinda confused how to proceed with this since we have no course text book and there are no lessons just assignments

## closed as off-topic by Aaron Stevens, Gert, Kyle Kanos, JMac, GiorgioPMar 8 at 0:03

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• Is the mass of the object and parachute given? And surface area too? – TechDroid Mar 7 at 14:05
• @TechDroid No values are given. We have to choose the object to drop and the chute ourselfs. The whole assignment is literally those two sentences – Slurba Mar 7 at 14:55
• @YuriyS "the air resistance FORCE is proportional to SPEED of the object" No, for any experiment the OP is likely to do it is proportional to the square of the speed. See en.wikipedia.org/wiki/Drag_coefficient – alephzero Mar 7 at 15:59
• @ Slurba. Does the answer below clear your disorientation on the subject? If so, you might as well give it the credit. – TechDroid Mar 7 at 17:00
• @alephzero, thank you, I deleted my comments – Yuriy S Mar 7 at 17:18

Air resistance is a negating force on a moving object, hence the difference in net force on the body without parachute and that with parachute is the air resistance force. Using $$F=\frac {md}{t^2}$$ you can calculate the net force on the mass with parachute and $$F=9.8m$$ for just the mass.