In words, the acceleration is pointing directly opposite to the radial displacement r at all times, and has a magnitude: | a | = | r ( t ) | ( d θ θ d t ) 2 = r ω ω 2 where vertical bars |...| denote the vector magnitude, which in the case of r (t) is simply the radius r of the path. This result agrees with the previous section, though the notation is slightly different.