AP Physics C 2017

(^1) Use the “star equations,” which we will address in detail momentarily.
(^2) When can’t you use kinematics, you ask? The most common situations are when a mass is attached to a spring, when a roller coaster
travels on a curvy track, or when a charge is moving in a non-uniform electric field produced by other charges. To approach these problems,
use conservation of energy, as discussed in Chapter 14 .
(^3) The writers of the AP exam love to throw things off cliffs.
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(^5) Why shouldn’t I say “positive” and “negative,” you ask? Well, how do these directions to the store sound: “Define north as positive. Start
from zero, and go positive 20 constantly; then come back at –20, also constantly.” You’d never say that! But, this is what you’ll sound like
unless you use common language.
(^6) −10m/s (^2) , if we’re on Earth.
(^7) Occasionally you might see a different form, F air = bv 2 . In this case, you might be asked about the terminal speed, but you will NOT
have to solve a differential equation.