Dynamics Dungeon: Crate Push
your pushfrictionvelocity
PREDICT
How this connects to AP Physics 1 (Topic 2.7, Friction): static friction adjusts to match the push, up to a maximum of μsN. Once the push exceeds that, the crate slides and friction drops to the kinetic value μkN, which is usually smaller. The graph of friction against push rises along a straight line, then drops and stays flat. The normal force here is N = mg, since the floor is level.