Where will the spaceman go when he falls through these strange planetary systems?
Whirl a conker around in a horizontal circle on a piece of string. What is the smallest angular speed with which it can whirl?
10 intriguing starters related to the mechanics of sport.
See how little g and your weight varies around the world. Did this variation help Bob Beamon to long-jumping succes in 1968?
A think about the physics of a motorbike riding upside down
Follow in the steps of Newton and find the path that the earth follows around 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.