a linkage that creates movement in the same direction using two pairs of levers

a linkage that uses short levers to push and pull three other levers in the same direction

Parallel and push-pull linkages

Design and technology

Reverse motion levers and linkages

Bell crank and lazy-tong linkages

Levers and linkages in products

User research

Plan and make an interactive book

Assembling components for an interactive book

Present the book to the user

This unit develops pupils' knowledge of mechanisms through levers and linkages. They will apply this knowledge by exploring mechanisms and incorporating them into an interactive book with a user-centred focus.

Levers and linkages: interactive books

Physical activity and equipment requiring safe use

Use of equipment that may require supervision for safety, e.g. scissors in KS1, needles, paint, knives, cooking.

To create movement, a parallel linkage must have ...

side-to-side, with the input and output not moving in any direction

side-to-side, with the input and output moving in the same direction

side-to-side, with the input and output moving in opposite directions

Which of the following explanations are the best description for parallel linkages?

How many fixed pivot points does a push-pull linkage usually have?

a free moving point that joins two levers together

What happens to the input and output movements on a push-pull linkage?

a rigid bar that bends when force applied

Which of the following describes a lever?

Complete the following sentence. A reverse motion linkage creates movement that is ...

a set of moving parts that make something happen

Which of the following is the word used to describe a mechanism that connects levers together?

Parallel and push-pull linkages

Lesson outcome

Content guidance