Humans have invented six devices that combine to make work easier. These six simple machines are the wheel and axle, the lever, the inclined plane, the pulley, the screw and the wedge.
The rest of the story
livescience.com
.
6 Simple Machines: Making Work Easier
Humans have invented six devices that combine to make work easier. These six simple machines are the wheel and axle, the lever, the inclined plane, the pulley, the screw and the wedge.
The rest of the story
livescience.com
There are currently 1 users browsing this thread. (0 members and 1 guests)
Posting Permissions
Quote