How do i prepare for the F=ma exam?

[oneplusone]

Hello,
How do i prepare for the F=ma exam? I have taken honors physics, but can only score about 5 on it :( i am taking AP Physics C this year however.

Also, does anyone know where to find old practice tests, with FULL SOLUTIONS (not answer key--Solutions!)?

THanks.

 

[Greg Bernhardt]

Try these practice tests
Past/Practice Exams - 2010 US Physics Team - AAPT.org

 

[Amrita-Singh]

I recently posted something similar may be useful to you
Physics Olympiad preparation

 

[oneplusone]

Thanks, but do you know where to find exams with SOLUTIONS? Like not just the answer, but how and why that's the answer.