Engineering, 11–13 years — 20 topics · MyLeoNes™ Kuks
20 engineering topics written for 11–13 years — not a older text simplified. In teaching order, each a deck of five cards: the idea, why it exists, a worked example, the common trap and where you meet it.
Engineering · 11–13 years
The engineering design cycle
Engineers turn a need into a tested solution by defining the problem, imagining options, building, testing and improving.
Forces and loads in structures
A structure stays safe when forces are carried through its parts to the ground without bending, sliding or breaking.
Why triangles strengthen structures
A triangle keeps its shape when its sides are fixed, so it can spread forces through a frame better than a flexible four-sided shape.
Gears change movement and force
Connected gears pass rotation from one wheel to another, changing speed, direction or turning force.
Choosing materials for a job
Engineers do not choose a material just because it looks good. They compare properties such as strength, flexibility, waterproofing, weight and cost, then match the material to the job.
Electric circuits
A circuit gives electric charge a complete path through components. Understanding the path explains why a lamp lights, why a switch works and why adding branches can change what happens.
Energy and efficiency
Devices receive energy and change it into useful movement, light, sound or heating. Efficiency compares the useful output with the energy supplied, because some energy spreads into unwanted heating, sound or friction.
Sensors and feedback
A sensor measures something, such as light, temperature, distance or pressure. Feedback uses that measurement to adjust a system, helping it respond to changing conditions instead of simply following one fixed action.
Scale drawings turn ideas into buildable plans
A drawing can show an object too large to fit on a page, as long as its measurements shrink in a reliable way.
Levers trade force for distance
A lever can make a task easier by using a rigid bar and a turning point, but the gain in force usually means moving farther.
Hydraulic systems transmit force through fluid
A push on a small piston can create pressure in a trapped liquid and produce a larger push on a wider piston.
Safety factors allow for the unexpected
Engineers do not design every part to fail exactly at its expected limit; they leave extra capacity for uncertainty, wear and unusual events.
Friction and bearings
Engineers cannot remove friction everywhere, but they can control it. Bearings help moving parts slide or turn with less wasted force.
Pulleys redirect force
A pulley is a wheel with a groove for a rope. One pulley can make lifting feel more convenient; several pulleys can reduce the force needed, while increasing the distance of rope pulled.
Thermal insulation
Insulation slows the movement of heat. Engineers use trapped air, foam, fibres or reflective surfaces to keep heat in, keep heat out, or protect people from hot and cold parts.
Measurement and tolerances
Real parts are never made with infinite precision. Engineers decide which small differences are safe, useful or unacceptable, so parts fit and products work reliably.
Buoyancy and hull design
A boat floats when its shape lets it displace enough water to support its weight. Engineers use buoyancy to design boats, life jackets and floating platforms that stay stable rather than simply sinking.
Stability and centre of mass
Engineers help objects stay upright by thinking about where their mass acts and where their support lies.
Cams turn rotation into repeated motion
A cam is a shaped rotating part that makes another part rise, fall or pause in a planned pattern.
Linkages guide and change movement
Connected bars can pass movement around corners or change a push into a different path.
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