Simple MachinesBook - 2015
"Machines help make work easier, like when you need to lift something heavy or reach way up high. There are six simple machines: the lever, the wheel and axle, the pulley, the ramp, the wedge, and the screw. Can you adjust a seesaw to lift an elephant? What happens when you combine two or more simple machines? Read and find out!"Amazon website.
Publisher: New York : HarperCollins Children's Books, 2015
Branch Call Number: J 621.8 WAR
Characteristics: 1 volume : chiefly illustrations (colour) ; 21 x 26 cm