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?
Follow in the steps of Newton and find the path that the earth follows around the sun.
Whirl a conker around in a horizontal circle on a piece of string. What is the smallest angular speed with which it can whirl?
A think about the physics of a motorbike riding upside down
Where will the spaceman go when he falls through these strange planetary systems?