What term describes a repeated back-and-forth or up-and-down motion?

What term describes a repeated back-and-forth or up-and-down motion?

• A. Oscillation
• B. Motion
• C. Pulse
• D. Vibration

Answer: (D)

Vibration is repeated back-and-forth or up-and-down motion around a rest position. This term captures how something moves back toward equilibrium after being displaced and keeps doing so in a continuous, often rapid way—think of a guitar string vibrating after being plucked or a small motor that causes a phone to buzz. While oscillation describes back-and-forth motion in general, vibration emphasizes the rapid, repetitive movement around a central point, which is why it’s the most precise choice here. Motion is too broad, and a pulse is a single event rather than ongoing repetition.

Vibration is repeated back-and-forth or up-and-down motion around a rest position. This term captures how something moves back toward equilibrium after being displaced and keeps doing so in a continuous, often rapid way—think of a guitar string vibrating after being plucked or a small motor that causes a phone to buzz. While oscillation describes back-and-forth motion in general, vibration emphasizes the rapid, repetitive movement around a central point, which is why it’s the most precise choice here. Motion is too broad, and a pulse is a single event rather than ongoing repetition.