An unfamiliar noise stops shoppers in their cars and a truck are crashing into each other. Fortunately no-one is hurt seriously, but what has caused the accident? This book looks at the topics of forces and motion to explain about speed, acceleration, friction, and momentum. It shows how investigators can use their knowledge of science and technology to sift through the evidence to determine the cause of the crash.
After working as an in-house journalist and editor in consumer electronics magazines, Ian Graham became a freelance writer. He has written more than 230 illustrated non-fiction books for children and teens, and contributed chapters to books including Dorling Kindersley’s Know it All and Big Ideas that Changed the World. He has a degree in applied physics and a postgraduate diploma in journalism.