For the wave described by y = 0.03 (5 x + 40 t) ,

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Waves Sound and Physical Optics · Waves Sound and Physical Optics

Problem

For the wave described by

y = 0.03\cos(5\pi x + 40\pi t)\,,

what is the direction of propagation? (

x

in metres,

t

in seconds) (a) Along

+x

-axis (b) The wave is standing (no net propagation) (c) Along

-x

-axis (d) Direction cannot be decided from the equation