The development of running blades has greatly enhanced the running ability of amputees and people born without legs. Learn more about how the inventor of running blades applied the scientific concept of potential elastic energy and biomimicry to design a high performance prosthetic leg. When he was 21 years old, Van Phillips had his left leg amputated below the knee as the result of an accident. He was given a prosthetic leg, but was frustrated that it didn’t work like his other leg. He called it a ‘dumb leg’ because it was heavy and it wouldn’t allow him to run and jump like he had done before his accident. Van decided to design a prosthetic leg that would enable him to bounce, jump and run like he had been able to before his accident. After years of designing, making, testing and breaking lots of prototypes, Van developed a prosthetic leg that enabled him to start running again.
Time to observe: working in pairs, students should observe how we move our bodies and use our muscles in a range of different activities from jumping as high as they can from standing and bouncing up and down on the spot. They should use drawings to show the stages involved and observe how each differ. Students will note the movement is a bit like how a spring works and will explore elastic potential energy.
Time to investigate: students will use a number of different types of balls to investigate elastic potential energy, discussing why the balls in their test might have different levels of elastic potential energy.
Stretch and challenge: Hooke's law states that the amount an elastic material changes when it is compressed (squashed) or extended (stretched) is directly proportional to the force applied to it. Students will learn about the Hooke's law equation and apply it to calculate the potential energy of a given spring.
Time to calculate: using the data provided within the resource, students can discover the specific strength of a material by dividing the figure for its strength by the value given for its density. Specific strength = strength / density. They should add their answers to a copy of the table within the resource, draw charts to compare strengths and then discuss which material they think Van Phillips used to make his prosthetic leg and give reasons.
Resources
Creating captivating cornflour invites pupils to discover the properties of this curious material in a fun, but often messy activity.
The right switch: discover Quantum Tunnelling Composite and technical textiles. As we invest in more mobile technology, we run the risk of bulging pockets and heavy handbags. This activity looks at finding a solution to this problem.
Moving house: investigating earthquakes and building materials. Did you know that buildings move? What happens to buildings in an earthquake or strong wind?
How is food packaged? Introducing thermochromatic paints and their application.
Smart muscle
Introducing ideas about keeping materials and tools cool in space.
As we try to use more renewable sources of energy and reduce our use of fossil fuels, it is important to ensure that electricity gets to us in an easy but efficient way
Cycling grows in importance as we look towards sustainable transport to save energy.
Milking it: Many products bought today are made from or contain plastic. How is it made, and what applications does it have?
Explore the role of STEM in how we hear sounds, record and play back music
Learn how sensor systems (motes) can be used to monitor the environment outside an aircraft.
This resource is designed to help students learn about the STEM involved in designing and making their own hovercraft.
Making waves explores how engineers have applied their knowledge of waves to make life better.
This equation impacts our lives in many areas, from computing to the shape of a football.
A STEM learning and teaching resource that shows how engineers have applied their knowledge to improve the security of the internet.
Explore a variety of magical maths activities, from multiplication tips to card tricks.
Are we connected? is a STEM teaching and learning resource that explores engineering through the technology we communicate and connect with.
Light Saver is a STEM resource that explores new technology developed by scientists and engineers that uses the properties of light to help save lives.
Power Up! looks at different types of energy, energy in engineering, the importance of electricity and how it is generated. It investigates different types of renewable energy sources through a number of hands-on practical activities.