A Longitudinal Wave Travels on a Slinky or Any Long

question 60

Multiple Choice

A longitudinal wave travels on a slinky or any long spring. The wave is represented by the equation x(x, t) = 2.1 cm cos(2000 rad/s t − 40 m⁻¹ x) . What is the direction of motion of a point on the spring due to the wave?

• A) the ± y direction
• B) the ± z direction
• C) the ± x direction

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