Simple & Powered Machines Set

Wedge

The wedge is a simple machine that is a modification of an inclined plane, however a wedge can move.

0-30 min.
Beginner
Grades 6-8
wedge

Connect

5-10 Minutes

A wedge is a modification of the inclined plane. Unlike an inclined plane a wedge can move.

Did you know?
Wedges are used to split granite!
A simple device called a wedge and feather can split huge granite blocks.

wedge-low-model
wedge-high-model

A wedge can have a single or two sloping surfaces. The effort you need depends on the relationship between the length and width of the wedge and consequently the sloping surface.

Common examples of wedges include axes, knives and doorstops.

Construct

5-10 Minutes

Build the following models. Use the Contemplate ideas below and on the Student Worksheet to learn about each model, one at a time.

Build E1 book II, page 16 to 25

principles-building-instructions-one

Contemplate

10-15 minutes

E1
This model shows a single wedge with a long sloping surface. The wedge needs a small effort to lift the load as the wedge has a small angle.

wedge-one

E2
This model shows a single wedge with a short sloping surface. The steep angle of the sloping surface needs a greater effort to lift the load compared to the previous wedge. But it also travels a shorter distance.

wedge-two

Teacher Support

Students will learn about:
Single and double wedges
The effort needed to lift depends on the relationship between length and width and consequently the sloping surface

9686 Simple & Powered Machines Set (two students per set recommended)