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

Invent shapes with different numbers of stable and unstable equilibrium points

A series of activities to build up intuition on the mathematics of friction.

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

Which parts of these framework bridges are in tension and which parts are in compression?

In this short problem we investigate the tensions and compressions in a framework made from springs and ropes.

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

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?

Is there a best way to stack cans? What do different supermarkets do? How high can you safely stack the cans?