Grateful acknowledgement is made to the following sources:
Photographs and images
Resource 1: Finding forces in pictures: Science Now Book 1 – Heinemann
Resource 4: Summary of forces for the teacher: Adapted from Developing Subject Knowledge – Jane Devereux
Every effort has been made to contact copyright holders. If any have been inadvertently overlooked the publishers will be pleased to make the necessary arrangements at the first opportunity.
Resource 6: More ideas for experiments around forces
Section 2 : Exploring sounds and music