D. J Ward
Author
Pub. Date
[2015]
Accelerated Reader
IL: LG - BL: 3.7 - AR Pts: 1
Description
"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.