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KengaRu [80]
3 years ago
14

What is An invention created for fun called ?

Physics
1 answer:
Fantom [35]3 years ago
4 0

Answer & Explanation:

A provisional patent application, also called a PPA, shows your invention as being in the process of getting a patent. This means that you will be safe from others copying your idea while your patent application is still being processed.

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As we know that friction force on box is given by

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