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pivot
A lever turns about its pivot.
Class 5 · English Medium · Cambridge · General science
Forces and simple machines
Explore forces and simple machines with an example and your own answers.
Original Kidemy foundation practice · Read the example, write your answers, then check. This starter is shared across class versions; it is not a complete board-specific lesson or course.
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Learn the idea
Simple machines change how a force is applied. A lever turns about a pivot; a pulley changes the direction of a pull. Machines do not create energy.
Worked example
A seesaw is a lever with a pivot. A fixed pulley can let someone pull down to raise a load.
- Read the example and explain which rule or evidence it uses.
- Try each task yourself, then compare the answer and its reason.
Your written practice
Show your working on paper and enter your answer here. If it does not match, compare the model and try again.
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pulley
A pulley guides the rope around a wheel.
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no
It changes how a force is applied; it does not supply free energy.
Take it further
Apply the idea in a new situation and explain your method. Open writing needs a guardian or teacher to review it.
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fulcrum
The lever turns around its fulcrum.
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reduce the required force
A longer path can reduce force; it does not remove the need for work.
Write in your own words. A guardian or teacher should review this response.
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With a longer travel distance, a smaller force can raise the same load; friction may add extra work.
Connect force, distance and the same height reached.
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