Reverse motion levers and linkages
I can make reverse motion linkages.
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Lesson details
Key learning points
- Levers are rigid bars that create movement by turning on a pivot point.
- Linkages are systems that create movement using one or more levers.
- Reverse motion linkages use a fixed pivot to change the direction of input so that the output goes the opposite way.
- Making a reverse motion linkage can help with understanding its features and movement.
Keywords
Mechanism - a set of moving parts that make something happen
Lever - a mechanism which creates movement
Pivot point - a point around which an object moves or rotates
Linkage - a mechanism connecting levers together
Reverse motion linkage - a linkage that creates movement in opposite directions
Common misconception
Levers are always used to make things move easier.
Some levers are designed to to move things faster or further, a pair of tweezers for example.
Equipment
Please see the additional materials for the equipment and resources.
Content guidance
- Risk assessment required - may contain allergens
- Risk assessment required - equipment
Supervision
Adult supervision required
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.What does rigid mean?
Q2.A see-saw usually creates the following type of movement:
Q3.What is a mechanism?
Q4.Which part of a wheelbarrow is the fulcrum?
Q5.Where on a see-saw do you usually see a fulcrum?
Q6.Where would you find the fulcrum on a pair of scissors?
Assessment exit quiz
6 Questions
Q1.On a lever, the fulcrum is ...
Q2.The force we use to make the lever work is called ...
Q3.Which of these is a class two lever?
