Mistake Master · AP Physics C · Unit 2 · Topic 2.2 · Step-Through Animation
Every Arrow Says Who’s Pushing
The Physics C convention is unforgiving and useful: every force is named “on A by B.” Shrink a block to a dot, hire one arrow per real force, and refuse any arrow that can’t fill in the “by” — starting with the famous phantom, the up-slope “force of motion.”
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