Don't waste time on kinematics if you already know it. Focus on "heavy hitters" like Electricity and Magnetism.
If you are determined to find a free, older legal copy (e.g., an edition out of print or in the public domain—note that Barron’s books are public domain), follow these safety rules: barron 39-s sat physics pdf
Take one full-length practice test from the PDF every other day under 100% real conditions: Don't waste time on kinematics if you already know it