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Force in the early years/Document: Difference between revisions
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'''Points to follow up''' | '''Points to follow up''' | ||
''Pressure= force | ''Pressure= force / area'' | ||
If someone stands on your toes wearing stiletto heels, it is more painful than if they do so wearing wellies. The same force is applied over a smaller area. This also explains why it is important to lie on a ladder if you are rescuing someone trapped in a frozen pond. Your pressure on the ice will be less because your weight (force) will be spread over a larger area. | If someone stands on your toes wearing stiletto heels, it is more painful than if they do so wearing wellies. The same force is applied over a smaller area. This also explains why it is important to lie on a ladder if you are rescuing someone trapped in a frozen pond. Your pressure on the ice will be less because your weight (force) will be spread over a larger area. | ||
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If we were to rearrange this formula: | If we were to rearrange this formula: | ||
''Acceleration = force | ''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. | ||
