I just took the test, but I can't remember the question word for word, it was along these lines though: You are standing on bus. It suddenly brakes what is the force that makes you lean forward?
A: Kinetic friction of your shoes on the bus floor
B: Static friction of your shoes on the bus floor
C: The normal force of the bus floor on you
D: No Force
The Attempt at a Solution
I was thinking B or C, I finally chose B, because wouldn't the normal force still be directed upward? I eliminated A, because my feet are not moving, but the static friction is holding me in place, yet I am leaning forward.