Science

5. Investigate mechanisms – levers and pulleys

Mission Objectives

Name the forces acting on a range of objects

Describe the effect forces can have on an object

Can explain how gears work

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5. Investigate mechanisms – levers and pulleys - PDF Handout 5. Investigate mechanisms – levers and pulleys - Handout

Keywords

Words and meanings to learn

load

the weight of an object

pulley

a wheel over which a belt, rope, or chain is pulled to lift or lower a heavy object

lever

a long arm that rests on a support called a fulcrum

pivot

a pin or shaft on which a mechanical part turns

fulcrum

the place where the rod pivots (or rotates)

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Required Resources

Resources: Mini whiteboards, a ball, a load to lift per child (e.g. weights/1 pint milk bottle/bag of sand) and materials to create a lever (e.g. string, cotton reels, dowel, wheels and cardboard).

Core Handout (2): A design sheet for the children to draw their pulleys and a results table for them to test the effectiveness of their pulleys. Page 2 asks children to evaluate their pulley system, suggesting ways to improve it.

Stretch Handout (3): A table asking children to suggest how levers work.

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