How many simple machines do you use every day? Probably more than you realize! Machines make work easier— helping break things apart, lift heavy objects, and
Read and find out about six simple machines—the lever, the wheel and axle, the pulley, the ramp, the wedge, and the screw—in this colorfully illustrated non
With the help of diagrams and photographs, this book describes some of the technology used in the construction industry, including simple machines, excavating e
Eyewitness Science covers all the main aspects of this key subject for all children, from atoms, elements, and energy, to forces, physics, and explosive chemica