Scholastic
Scholastic: Dirtmeister's Science Reporters: Simple Machines: The Wedge
Scholastic provides an in-depth explanation to a simple-machine concept here as The Wedge. Also provides a picture and several examples for understanding.
Scholastic
Scholastic: Dirtmeister's Science Reporters: Simple Machines: The Screw
Scholastic provides an in-depth description here of a simple machine called The Screw. Also provides a picture and several examples for understanding.