What are some common misconceptions about physics for beginners?

[NCC-1701]

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well since I've read start by introducing myself and not posting a question, I'll start by saying I've never had taken a physics class in any school and I'm 57 now I do enjoy different aspects of it, I tinker with some model testing some promising some failed, but always learning from both. I'm presently working on a different project that I would say deals with pneumatic , vacuums, hydraulics , mechanical etc... but I'm unsure of some simple stuff that I think has a simple understanding but I just can't be sure without asking someone else.
I'll start a thread next concerning pic I uploaded.

 

[phinds]

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