y(x) = 2.2 sin(0.32x) + 1.1 sin(0.13x + 1.2)   (x, y: m)

at = 0    an = v²/ρ    ρ = (1 + y′²)3/2 / |y″|

t 0.00 s

s = 0.00 m x = 0.00 m v = 0.00 m/s (at = 0) ρ = — m an = 0.00 m/s²