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Force in the early years/Document: Difference between revisions
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The same energy is required to close a door however you do it. If you close it with your hand near the hinge, it is hard work. A large force is needed because the distance is small. If you close it with your hand near the handle it is much easier. Less force is needed because the distance is greater. | The same energy is required to close a door however you do it. If you close it with your hand near the hinge, it is hard work. A large force is needed because the distance is small. If you close it with your hand near the handle it is much easier. Less force is needed because the distance is greater. | ||
''Force + mass x acceleration'' | |||
In other words, the harder we push, the more things will speed up. Force is directly proportional to acceleration. | In other words, the harder we push, the more things will speed up. Force is directly proportional to acceleration. | ||
If we were to rearrange this formula: | If we were to rearrange this formula: | ||
''Acceleration = force mass'' | |||
Then we can see that acceleration is inversely proportional to the mass of an object. The bigger the object the harder we would have to push to get it to speed up. | Then we can see that acceleration is inversely proportional to the mass of an object. The bigger the object the harder we would have to push to get it to speed up. | ||
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Explore toys: make a list and identify which aspects of forces that could be used. | Explore toys: make a list and identify which aspects of forces that could be used. | ||
'''Definitions''' | |||
A force is when you’re made to do something. | A force is when you’re made to do something. | ||
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(Sparks 1993 PSR 28) | (Sparks 1993 PSR 28) | ||
Mass is a measure of the ‘amount of stuff’. | Mass is a measure of the ‘amount of stuff’. | ||
Mass is measured in grams (g) and kilograms (kg). | Mass is measured in grams (g) and kilograms (kg). | ||
