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Felix's Parachute Jump
Why do this problem?
This problem encourages students to consider the maths behind the world record breaking parachute jump by Felix Baumgartner on October 14th 2012. The context can lead to many engaging questions, a few of which are suggested in the problem.
Begin by showing one of the video clips from Felix's jump - they are available on the
Red Bull Stratos
"What mathematical questions does the video prompt for you?"
Give students some time to discuss and share their ideas, and write up their questions on the board. If suggestions aren't forthcoming, the following are suggested in the problem:
As Felix stepped from the capsule at 39km, what proportion of the Earth's surface could he see?
Felix landed 9 minutes and 3 seconds after jumping. How much quicker would an object in freefall all the way down (ie without a parachute) land?
Can you estimate the maximum speed Felix reached before opening his parachute after 4 minutes and 19 seconds of freefall?
Of course, if you have a particular topic in mind, you could choose to share just one of these questions with the class and work on that.
Once students have decided on a question to work on, they will need to do some modelling and research in order to answer their question. Here are some useful facts from the jump:
Height of jump: 39,045 m
Time spent in freefall: 4 minutes 22 seconds
Total jump time: 9 minutes 9 seconds
Radius of earth: 6378km
Escape from Planet Earth
Meet the team
The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice. More information on many of our other activities can be found here.
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