Physical education, 14–17 years — 20 topics · MyLeoNes™ Kuks
20 physical education topics written for 14–17 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.
Physical education · 14–17 years
Acceleration
Acceleration tells us how quickly velocity changes. It is not only about going faster: slowing down or changing direction also counts.
Resultant force
Several pushes and pulls can act on one object at once. The resultant force is their combined effect, and it tells us whether the object’s motion will change.
Conservation of energy
Energy can move between objects and change form, but it is not simply destroyed. Tracking the transfers explains machines, falls, heating, and many everyday changes.
Electric circuits
Current is charge flowing through a complete path, while voltage is the energy transferred per unit of charge. The distinction explains why batteries, wires, and components work together.
Momentum and collisions
Momentum helps us describe how difficult it is to stop a moving object. It connects mass and velocity, so it is especially useful when objects collide.
Pressure in fluids
Pressure explains why a force can have different effects depending on the area or depth involved. It helps make sense of sharp tools, deep water and air around us.
Wave speed, frequency and wavelength
Waves transfer energy and information without carrying the material along with them overall. Three measurements describe their repeating pattern: speed, frequency and wavelength.
Radioactive decay and half-life
Some atomic nuclei are unstable and change spontaneously, releasing radiation. Half-life gives a predictable pattern for a large sample, even though no one can know exactly when one particular nucleus will decay.
Newton’s third law
Forces always come in pairs between two interacting objects.
Work and power
Work measures energy transferred by a force; power measures how quickly that transfer happens.
Specific heat capacity
Different materials need different amounts of energy to change their temperature.
Electromagnetic induction
A changing magnetic field can create a voltage in a wire.
Density
How mass is packed into a given volume, and why equal-sized objects can have very different masses.
Hooke’s law
How the extension of a spring changes with the force pulling it, while the spring remains elastic.
Refraction of light
Why light changes direction when it crosses into a different material, and how to predict the new direction.
The motor effect
How a magnetic field pushes a current-carrying wire, producing the force that makes an electric motor turn.
Gravitational field strength
How a planet’s gravitational pull is measured, and why the same object can have a different weight on another world.
Moments and turning forces
Why a force turns something more effectively when it acts farther from a pivot.
Terminal velocity
Why a falling object can stop speeding up even though gravity is still pulling it down.
Specific latent heat
How a substance can absorb or release energy while its temperature stays unchanged during a change of state.
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