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8846 /www/nrich/html/content/id/8846/ 1 0000-00-00T00:00:00 <?xml version="1.0" encoding="UTF-8"?> <mdoxml version="1.0">The problem: You are members of a packaging department asked to design a package for a very delicate ornament of the size of a crisp. Design and manufacture containers to store and protect a single potato crisp in each. Requirements: 1. The Crisp Package must be able to withstand the shock of a drop from 3 metres on to a hard surface when placed inside a 2 litre ice cream carton. 2. The package must be capable of being opened by hand without mechanical aids. You have the following materials: <ul> <li>Potato Crisps </li> <li>Sellotape</li> <li>A4 paper </li> <li>Scissors</li> <li>Paper clips </li> <li>Pencils</li> <li>Stapler and staples </li> <li>Rulers</li> <li>Glue</li> </ul> Things to consider: <ul> <li>What factors affect your cargo’s chances of survival? Speed of descent, force of impact, etc.</li> <li>What forces are acting on your package?</li> <li>What is the surface area of your design? Why is this not the only consideration to your design?</li> </ul></mdoxml> <?xml version="1.0" encoding="UTF-8"?> <mdoxml version="1.0">Why work on this activity? Pupils are asked to design and make two containers each holding a potato crisp. The package must withstand a drop of 3 metres on to a hard surface and be capable of being opened by hand without mechanical aid. Objectives 1. To give pupils opportunity to participate in problem solving. 2. To give pupils opportunity to work in a team. 3. To enable pupils to relate to work in local industry. Mathematical learning points 1. Surface area 2. Nets of solids 3. Construction skills 4. Forces Possible approach 30 minutes for planning. 40 minutes to manufacture containers. 20 minutes for testing. 25 minutes for discussion. If the activity is split over two periods the crisps will have to be stored in airtight containers to prevent them going soft. After the activity ask pupils to bring in packaging for discussion. A visit to a local factory could be arranged: 1. To see packaging (preferably a variety) in action. 2. To hear the factory staff explain hoe they solve packaging problems. 3. To hear about career opportunities at all levels. Equipment Per group: A4 paper, paperclips, stapler, staples, glue, sellotape, scissors, pencils, rulers. Packets of crisps – about half a packet per group. 2 litre plastic ice cream container. Key questions What factors affect your cargo’s chances of survival? Speed of descent, force of impact, etc. What forces are acting on your package? What is the surface area of your design? Why is this not the only consideration to your design? Possible Extensions Examine the shapes that were successful packages – what do they have in common? Why were they successful designs and not others? Can be used as a way into KS4/5 physics or mechanics looking at force diagrams and principles such as Bernoulli’s Possible Support Pupils could be shown illustrations of various solid shapes for inspiration – some pupils may need help creating the nets of these shapes</mdoxml> 2 3 0 0 0 0 0 new resource Applications STEM - design technology Applications Food technology Applications potential STEM problem