Recent content by NickStar

Thank you, I didn't put gravity to my equation. After I did, I got the right result.

I solved the first one so It doesn't really matter. But I really need to solve the second one(I have no clue how to do it) Here is my attempt:

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No, it's not. But I just can't understand when do we have to use Hooke’s law and when energy equations. And the most important is the second part(with speed) (I can't even get something close to the right answer)