Ramps and Wedges

ISBN-13: 9781432965884 / Angielski / Miękka / 2012 / 24 str.

Sian Smith

Opis

Each book in this series focuses on a type of simple mechanism and examines how it is used to make different toys work. This book examines ramps and wedges, and uses simple language and labeled photographs to explain the scientific principles behind their use.