Walker, Sally M.; Feldmann, Roseann

Pulleys

Focusing on simple machines and how they work in our daily lives, this fun and informative new series introduces young readers to several basic concepts of physics - such as work, force, gravity and friction. Includes easy-to-do experiments, colourful photos, clear text and fun activities. This volume explores how a pulley works, showing through fun experiments and clear diagrams how this simple machine can make work easier and faster. With full-colour photos on every page. Ages 7-9.