An article demonstrating mathematically how various physical modelling assumptions affect the solution to the seemingly simple problem of the projectile.

Follow in the steps of Newton and find the path that the earth follows around the sun.

Things are roughened up and friction is now added to the approximate simple pendulum

Where will the spaceman go when he falls through these strange planetary systems?

Dip your toe into the world of quantum mechanics by looking at the Schrodinger equation for hydrogen atoms

A think about the physics of a motorbike riding upside down

How high will a ball taking a million seconds to fall travel?

Gravity on the Moon is about 1/6th that on the Earth. A pole-vaulter 2 metres tall can clear a 5 metres pole on the Earth. How high a pole could he clear on the Moon?

Investigate why the Lennard-Jones potential gives a good approximate explanation for the behaviour of atoms at close ranges

Investigate some of the issues raised by Geiger and Marsden's famous scattering experiment in which they fired alpha particles at a sheet of gold.

A look at different crystal lattice structures, and how they relate to structural properties

This is the technology section of stemNRICH - Core.

Explore displacement/time and velocity/time graphs with this mouse motion sensor.

Can you work out the natural time scale for the universe?

See how the motion of the simple pendulum is not-so-simple after all.

Find out why water is one of the most amazing compounds in the universe and why it is essential for life. - UNDER DEVELOPMENT

Problems which make you think about the kinetic ideas underlying the ideal gas laws.

How fast would you have to throw a ball upwards so that it would never land?

An introduction to a useful tool to check the validity of an equation.

Some explanations of basic terms and some phenomena discovered by ancient astronomers

What is an AC voltage? How much power does an AC power source supply?

A look at the fluid mechanics questions that are raised by the Stonehenge 'bluestones'.

Show that even a very powerful spaceship would eventually run out of overtaking power

Explore the energy of this incredibly energetic particle which struck Earth on October 15th 1991

A look at a fluid mechanics technique called the Steady Flow Momentum Equation.

Look at the units in the expression for the energy levels of the electrons in a hydrogen atom according to the Bohr model.

Explore how can changing the axes for a plot of an equation can lead to different shaped graphs emerging

Explore the Lorentz force law for charges moving in different ways.

A ball whooshes down a slide and hits another ball which flies off the slide horizontally as a projectile. How far does it go?

Many physical constants are only known to a certain accuracy. Explore the numerical error bounds in the mass of water and its constituents.

Investigate the effects of the half-lifes of the isotopes of cobalt on the mass of a mystery lump of the element.

Have you got the Mach knack? Discover the mathematics behind exceeding the sound barrier.

Find the equation from which to calculate the resistance of an infinite network of resistances.

engNRICH is the area of the stemNRICH Advanced site devoted to the mathematics underlying the study of engineering

How does the half-life of a drug affect the build up of medication in the body over time?

Explore the rates of growth of the sorts of simple polynomials often used in mathematical modelling.

Can you arrange a set of charged particles so that none of them start to move when released from rest?

Work out the numerical values for these physical quantities.

Which line graph, equations and physical processes go together?

Estimate these curious quantities sufficiently accurately that you can rank them in order of size

When you change the units, do the numbers get bigger or smaller?

Which units would you choose best to fit these situations?