When two surfaces are in contact there is a force acting on each surface that acts in a direction to stop them moving past one...

Physics Narrative 5-11 11-14

A floor seems to just be. How such a passive object can provide an upward force is indeed a puzzle.

Teaching Guidance 5-11 11-14

This misconception appears in two forms. The first holds that friction happens only when things move (slipping). This idea is...

Teaching Guidance 5-11 11-14

For many learners air is seen as nothing. Comparing the mass of air in a small domestic room to the mass of a child might help...

Teaching Guidance 5-11 11-14

The bag doesn't burst because the plastic stretches rather than tears as the pencils are pushed through it. If you take a...

At home 5-11 11-14

The toothpicks move. Just like synchronised swimmers! The water makes the wood expand, the broken ends press against each...

At home 5-11 11-14