Wheels and Axles

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 - through,easy-to-do-experiments, colourful photos, clear,text and fun activities. This volume focuses on,the most recognisable simple machine, the wheel,and axle. Simple and fun experiments illustrate,the basic concepts explained in the text to show,kids just how easy work can be. With full-colour,photos on every page. Ages 7-9