I wonder...How can I safely move and lift a heavy load?
Your challenge is to move and lift a box filled with a whole lot of weight! You’ll do it once without any tools, then again with the help of three “simple machines”: a lever, a wheel, and an inclined plane. See whether it’s easier to
do the job when you use the tools.
Number of Downloads: 164 | Created on: 08/28/2014