Circular motion

problem
Favourite

Whirlyball

Age

16 to 18

Challenge level

Whirl a conker around in a horizontal circle on a piece of string. What is the smallest angular speed with which it can whirl?
problem
Favourite

Gravity Paths

Age

16 to 18

Challenge level

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

Motorbike Momentum

Age

16 to 18

Challenge level

A think about the physics of a motorbike riding upside down
problem

10 Olympic Starters

Age

16 to 18

Challenge level

10 intriguing starters related to the mechanics of sport.
$\Little little g$

problem

Little Little G

Age

16 to 18

Challenge level

See how little g and your weight varies around the world. Did this variation help Bob Beamon to long-jumping succes in 1968?
problem

Earth Orbit

Age

16 to 18

Challenge level

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

Mathematics has allowed us now to measure lots of things about eclipses and so calculate exactly when they will happen, where they can be seen from, and what they will look like.