Learn how simple machines make work easier in these colorful nonfiction picture books all about science and engineering! What if an elephant sat on your book and refused to move. How could you lift it? Very carefully! You might want to use a pulley. A pulley is one of six simple machines that are designed to make different kinds of work such as lifting, pulling, pushing easier. In Pulleys Pull …
Get ready to discover how giant machines work - from car transporters to dump trucks - with amazing illustrations, cutaway views, magnified insets and detailed photographs.
What are the world's biggest ships? What is a 'smart' bomb? You'll ifnd the answers to these and over 100 other intriguing questions inside this superbly illustrated book.