Science presenter Jon Chase explains friction. He describes how friction opposes or prevents motion, and demonstrates the force in action with an experiment involving two interleaved books.

Martha loves to relate her science examples in practical, everyday terms, that the kids can identify with. For example: “Divide the speed of light (300 megameters per second) by the FM frequency on ...

Two forces can be added together to find a resultant force. In the diagram of a toy trailer below, when two children pull on the handle, one with a force of 3 newtons (N) to the left and one with ...

The 3D experiment used photoelastic particles and computed tomography to visualize the transmission of forces. According ... and stick–slip frictional motion in tectonic and induced earthquakes.

Last month, physicists working at the LHCb experiment at the Large Hadron Collider described results that could point to a new particle and force. Dr Mitesh Patel, from Imperial College London ...