Parachutes & Drag LO: Investigate how area can affect air resistance.
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Transcript of Parachutes & Drag LO: Investigate how area can affect air resistance.
![Page 1: Parachutes & Drag LO: Investigate how area can affect air resistance.](https://reader036.fdocuments.us/reader036/viewer/2022082418/5697bf901a28abf838c8e132/html5/thumbnails/1.jpg)
Parachutes & Drag
LO: Investigate how area can affect air resistance
![Page 3: Parachutes & Drag LO: Investigate how area can affect air resistance.](https://reader036.fdocuments.us/reader036/viewer/2022082418/5697bf901a28abf838c8e132/html5/thumbnails/3.jpg)
Your investigation• Design and make a parachute to provide
maximum AIR RESISTANCE for your sky-diver (a lump of plasticine)
• Time how long it takes to fall 2m• Repeat the test 3 times• Test three different sizes of parachute• Calculate the average time and speed for each
size parachute
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Fill out your results tableSize of parachute (eg: small or 20cm3)
Time taken to fall ___ cm
Time taken to fall ___ cm
Time taken to fall ___ cm
Average Time (seconds)
Speed (s = d/t)
Use your average time for each parachute to work out the speed. Remember that:
Speed = Distance ÷ Time
To work out the average, add all the
times for each activity together and divide by the number of times
you repeated the activity (three)
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Questions• Does the change in size of the
parachute make any difference. Why?
• How do the upwards and downwards forces on your parachute change as it descends?
• Would you do a parachute jump?!
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Homework - Forces Diagrams
• Draw forces diagrams for a parachutist at three different stages of descent:– Start– Middle – End
• What two forces are acting on the parachutist?• Make sure you label your forces and that the size
of the arrows gives a clear indication of the size of the force
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STARTThe parachutist has just
jumped out of the plane and is accelerating very fast
towards the earth!
MIDDLEThe parachutist is now travelling at a constant
speed
ENDThe parachutist has opened
his parachute and has slowed down
Air resistance Air resistance Air resistance
Gravity Gravity Gravity