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Inertia


amandarocks27

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Newton's first law can also be called the law of inertia. It pretty much means that unless there is an unbalanced force on an object, it will continue doing what is doing whether that be moving or staying still. This law is difficult to see on Earth because we have this stupid thing called friction so things that are moving will eventually stop. Inertia is an objects tendency to resist a change in velocity.

Let's say my dog Cujo (who seems to be the subject of a lot of my blog posts) was 25 kg and running at a speed of 4 m/s on Tuesday, but on Friday he was 26 kg and running at a speed of 4 m/s. Did his inertia change? Yes it did! Another word for inertia is mass. So when he went from 25 kg to 26 kg, his inertia changed too.

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